Data Warehouse MCQ Questions and Answers

1. __________ is a subject-oriented, integrated, time-variant, nonvolatile collection of data in support of
management decisions.
A. Data Mining.
B. Data Warehousing.
C. Web Mining.
D. Text Mining.
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The correct answer is: B
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2. The data Warehouse is__________.
A. read only.
B. write only.
C. read write only.
D. none.
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The correct answer is: A
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3. Expansion for DSS in DW is__________.
A. Decision Support system.
B. Decision Single System.
C. Data Storable System.
D. Data Support System.
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The correct answer is: A
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4. The important aspect of the data warehouse environment is that data found within the data warehouse
is___________.
A. subject-oriented.
B. time-variant.
C. integrated.
D. All of the above.
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The correct answer is: D
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5. The time horizon in Data warehouse is usually __________.
A. 1-2 years.
B. 3-4years.
C. 5-6 years.
D. 5-10 years.
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The correct answer is: D
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6. The data is stored, retrieved & updated in ____________.
A. OLAP.
B. OLTP.
C. SMTP.
D. FTP.
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The correct answer is: B
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7. __________describes the data contained in the data warehouse.
A. Relational data.
B. Operational data.
C. Metadata.
D. Informational data.
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The correct answer is: C
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8. ____________predicts future trends & behaviors, allowing business managers to make proactive,
knowledge-driven decisions.
A. Data warehouse.
B. Data mining.
C. Datamarts.
D. Metadata.
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The correct answer is: B
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9. __________ is the heart of the warehouse.
A. Data mining database servers.
B. Data warehouse database servers.
C. Data mart database servers.
D. Relational data base servers.
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The correct answer is: B
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10. ________________ is the specialized data warehouse database.
A. Oracle.
B. DBZ.
C. Informix.
D. Redbrick.
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The correct answer is: D
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11. ________________defines the structure of the data held in operational databases and used by
operational applications.
A. User-level metadata.
B. Data warehouse metadata.
C. Operational metadata.
D. Data mining metadata.
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The correct answer is: C
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12. ________________ is held in the catalog of the warehouse database system.
A. Application level metadata.
B. Algorithmic level metadata.
C. Departmental level metadata.
D. Core warehouse metadata.
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The correct answer is: B
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13. _________maps the core warehouse metadata to business concepts, familiar and useful to end users.
A. Application level metadata.
B. User level metadata.
C. Enduser level metadata.
D. Core level metadata.
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The correct answer is: A
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14. ______consists of formal definitions, such as a COBOL layout or a database schema.
A. Classical metadata.
B. Transformation metadata.
C. Historical metadata.
D. Structural metadata.
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The correct answer is: A
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15. _____________consists of information in the enterprise that is not in classical form.
A. Mushy metadata.
B. Differential metadata.
C. Data warehouse.
D. Data mining.
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The correct answer is: A
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16. . ______________databases are owned by particular departments or business groups.
A. Informational.
B. Operational.
C. Both informational and operational.
D. Flat.
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The correct answer is: B
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17. The star schema is composed of __________ fact table.
A. one.
B. two.
C. three.
D. four.
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The correct answer is: A
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18. The time horizon in operational environment is ___________.
A. 30-60 days.
B. 60-90 days.
C. 90-120 days.
D. 120-150 days.
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The correct answer is: B
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19. The key used in operational environment may not have an element of__________.
A. time.
B. cost.
C. frequency.
D. quality.
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The correct answer is: A
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20. Data can be updated in _____environment.
A. data warehouse.
B. data mining.
C. operational.
D. informational.
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The correct answer is: C
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21. Record cannot be updated in _____________.
A. OLTP
B. files
C. RDBMS
D. data warehouse
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The correct answer is: D
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22. The source of all data warehouse data is the____________.
A. operational environment.
B. informal environment.
C. formal environment.
D. technology environment.
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The correct answer is: A
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23. Data warehouse contains_____________data that is never found in the operational environment.
A. normalized.
B. informational.
C. summary.
D. denormalized.
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The correct answer is: C
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24. The modern CASE tools belong to _______ category.
A. a. analysis.
B. b.Development
C. c.Coding
D. d.Delivery
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The correct answer is: A
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25. Bill Inmon has estimated___________of the time required to build a data warehouse, is consumed in
the conversion process.
A. 10 percent.
B. 20 percent.
C. 40 percent
D. 80 percent.
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The correct answer is: D
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26. Detail data in single fact table is otherwise known as__________.
A. monoatomic data.
B. diatomic data.
C. atomic data.
D. multiatomic data.
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The correct answer is: C
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27. _______test is used in an online transactional processing environment.
A. MEGA.
B. MICRO.
C. MACRO.
D. ACID.
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The correct answer is: D
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28. ___________ is a good alternative to the star schema.
A. Star schema.
B. Snowflake schema.
C. Fact constellation.
D. Star-snowflake schema.
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The correct answer is: C
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29. The biggest drawback of the level indicator in the classic star-schema is that it limits_________.
A. quantify.
B. qualify.
C. flexibility.
D. ability.
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The correct answer is: C
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30. A data warehouse is _____________.
A. updated by end users.
B. contains numerous naming conventions and formats
C. organized around important subject areas.
D. contains only current data.
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The correct answer is: C
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31. An operational system is _____________.
A. used to run the business in real time and is based on historical data.
B. used to run the business in real time and is based on current data.
C. used to support decision making and is based on current data.
D. used to support decision making and is based on historical data.
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The correct answer is: B
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32. The generic two-level data warehouse architecture includes __________.
A. at least one data mart.
B. data that can extracted from numerous internal and external sources.
C. near real-time updates.
D. far real-time updates.
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The correct answer is: C
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33. The active data warehouse architecture includes __________
A. at least one data mart.
B. data that can extracted from numerous internal and external sources.
C. near real-time updates.
D. all of the above.
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The correct answer is: D
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34. Reconciled data is ___________.
A. data stored in the various operational systems throughout the organization.
B. current data intended to be the single source for all decision support systems.
C. data stored in one operational system in the organization.
D. data that has been selected and formatted for end-user support applications.
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The correct answer is: B
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35. Transient data is _____________.
A. data in which changes to existing records cause the previous version of the records to be eliminated.
B. data in which changes to existing records do not cause the previous version of the records to be
eliminated.
C. data that are never altered or deleted once they have been added.
D. data that are never deleted once they have been added.
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The correct answer is: A
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36. The extract process is ______.
A. capturing all of the data contained in various operational systems.
B. capturing a subset of the data contained in various operational systems.
C. capturing all of the data contained in various decision support systems.
D. capturing a subset of the data contained in various decision support systems.
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The correct answer is: B
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37. Data scrubbing is _____________.
A. a process to reject data from the data warehouse and to create the necessary indexes.
B. a process to load the data in the data warehouse and to create the necessary indexes.
C. a process to upgrade the quality of data after it is moved into a data warehouse.
D. a process to upgrade the quality of data before it is moved into a data warehouse
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The correct answer is: D
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38. The load and index is ______________.
A. a process to reject data from the data warehouse and to create the necessary indexes.
B. a process to load the data in the data warehouse and to create the necessary indexes.
C. a process to upgrade the quality of data after it is moved into a data warehouse.
D. a process to upgrade the quality of data before it is moved into a data warehouse.
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The correct answer is: B
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39. Data transformation includes __________.
A. a process to change data from a detailed level to a summary level.
B. a process to change data from a summary level to a detailed level.
C. joining data from one source into various sources of data.
D. separating data from one source into various sources of data.
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The correct answer is: A
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40. ____________ is called a multifield transformation.
A. Converting data from one field into multiple fields.
B. Converting data from fields into field.
C. Converting data from double fields into multiple fields.
D. Converting data from one field to one field.
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The correct answer is: A
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41. The type of relationship in star schema is __________________.
A. many-to-many.
B. one-to-one.
C. one-to-many.
D. many-to-one.
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The correct answer is: C
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42. Fact tables are ___________.
A. completely demoralized.
B. partially demoralized.
C. completely normalized.
D. partially normalized.
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The correct answer is: C
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43. _______________ is the goal of data mining.
A. To explain some observed event or condition.
B. To confirm that data exists.
C. To analyze data for expected relationships.
D. To create a new data warehouse.
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The correct answer is: A
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44. Business Intelligence and data warehousing is used for ________.
A. Forecasting.
B. Data Mining.
C. Analysis of large volumes of product sales data.
D. All of the above.
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The correct answer is: D
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45. The data administration subsystem helps you perform all of the following, except__________.
A. backups and recovery.
B. query optimization.
C. security management.
D. create, change, and delete information.
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The correct answer is: D
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46. The most common source of change data in refreshing a data warehouse is _______.
A. queryable change data.
B. cooperative change data.
C. logged change data.
D. snapshot change data.
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The correct answer is: A
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47. ________ are responsible for running queries and reports against data warehouse tables.
A. Hardware.
B. Software.
C. End users.
D. Middle ware.
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The correct answer is: C
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48. Query tool is meant for __________.
A. data acquisition.
B. information delivery.
C. information exchange.
D. communication.
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The correct answer is: A
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49. Classification rules are extracted from _____________.
A. root node.
B. decision tree.
C. siblings.
D. branches.
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The correct answer is: B
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50. Dimensionality reduction reduces the data set size by removing ____________.
A. relevant attributes.
B. irrelevant attributes.
C. derived attributes.
D. composite attributes.
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The correct answer is: B
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51. ___________ is a method of incremental conceptual clustering.
A. CORBA.
B. OLAP.
C. COBWEB.
D. STING.
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The correct answer is: C
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52. Effect of one attribute value on a given class is independent of values of other attribute is called
_________.
A. value independence.
B. class conditional independence.
C. conditional independence.
D. unconditional independence.
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The correct answer is: A
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53. The main organizational justification for implementing a data warehouse is to provide ______.
A. cheaper ways of handling transportation.
B. decision support.
C. storing large volume of data.
D. access to data.
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The correct answer is: C
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54. Multidimensional database is otherwise known as____________.
A. RDBMS
B. DBMS
C. EXTENDED RDBMS
D. EXTENDED DBMS
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The correct answer is: B
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55. Data warehouse architecture is based on ______________.
A. DBMS.
B. RDBMS.
C. Sybase.
D. SQL Server.
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The correct answer is: B
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56. Source data from the warehouse comes from _______________.
A. ODS.
B. TDS.
C. MDDB.
D. ORDBMS.
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The correct answer is: A
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57. ________________ is a data transformation process.
A. Comparison.
B. Projection.
C. Selection.
D. Filtering.
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The correct answer is: D
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58. The technology area associated with CRM is _______________.
A. specialization.
B. generalization.
C. personalization.
D. summarization.
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The correct answer is: C
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59. SMP stands for _______________.
A. Symmetric Multiprocessor.
B. Symmetric Multiprogramming.
C. Symmetric Metaprogramming.
D. Symmetric Microprogramming.
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The correct answer is: A
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60. __________ are designed to overcome any limitations placed on the warehouse by the nature of the
relational data model.
A. Operational database.
B. Relational database.
C. Multidimensional database.
D. Data repository.
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The correct answer is: C
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61. __________ are designed to overcome any limitations placed on the warehouse by the nature of the
relational data model.
A. Operational database.
B. Relational database.
C. Multidimensional database.
D. Data repository.
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The correct answer is: C
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62. MDDB stands for ___________.
A. multiple data doubling.
B. multidimensional databases.
C. multiple double dimension.
D. multi-dimension doubling.
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The correct answer is: B
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63. ______________ is data about data.
A. Metadata.
B. Microdata.
C. Minidata.
D. Multidata.
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The correct answer is: A
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64. ___________ is an important functional component of the metadata.
A. Digital directory.
B. Repository.
C. Information directory.
D. Data dictionary.
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The correct answer is: C
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65. EIS stands for ______________.
A. Extended interface system.
B. Executive interface system.
C. Executive information system.
D. Extendable information system.
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The correct answer is: C
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66. ___________ is data collected from natural systems.
A. MRI scan.
B. ODS data.
C. Statistical data.
D. Historical data.
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The correct answer is: A
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67. _______________ is an example of application development environments.
A. Visual Basic.
B. Oracle.
C. Sybase.
D. SQL Server.
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The correct answer is: A
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68. The term that is not associated with data cleaning process is ______.
A. domain consistency.
B. deduplication.
C. disambiguation.
D. segmentation.
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The correct answer is: D
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69. ____________ are some popular OLAP tools.
A. Metacube, Informix.
B. Oracle Express, Essbase.
C. HOLAP.
D. MOLAP.
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The correct answer is: A
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70. Capability of data mining is to build ___________ models.
A. retrospective.
B. interrogative.
C. predictive.
D. imperative.
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The correct answer is: C
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71. _____________ is a process of determining the preference of customer’s majority.
A. Association.
B. Preferencing.
C. Segmentation.
D. Classification.
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The correct answer is: B
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72. Strategic value of data mining is ______________.
A. cost-sensitive.
B. work-sensitive.
C. time-sensitive.
D. technical-sensitive.
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The correct answer is: C
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73. ____________ proposed the approach for data integration issues.
A. Ralph Campbell.
B. Ralph Kimball.
C. John Raphlin.
D. James Gosling.
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The correct answer is: B
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74. The terms equality and roll up are associated with ____________.
A. OLAP.
B. visualization.
C. data mart.
D. decision tree.
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The correct answer is: C
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75. Exceptional reporting in data warehousing is otherwise called as __________.
A. exception.
B. alerts.
C. errors.
D. bugs.
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The correct answer is: B
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76. ____________ is a metadata repository.
A. Prism solution directory manager.
B. CORBA.
C. STUNT.
D. COBWEB.
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The correct answer is: A
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77. ________________ is an expensive process in building an expert system.
A. Analysis.
B. Study.
C. Design.
D. Information collection.
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The correct answer is: D
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78. The full form of KDD is _________.
A. Knowledge database.
B. Knowledge discovery in database.
C. Knowledge data house.
D. Knowledge data definition.
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The correct answer is: B
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79. The first International conference on KDD was held in the year _____________.
A. 1996.
B. 1997.
C. 1995.
D. 1994.
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The correct answer is: C
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80. Removing duplicate records is a process called _____________.
A. recovery.
B. data cleaning.
C. data cleansing.
D. data pruning.
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The correct answer is: B
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81. ____________ contains information that gives users an easy-to-understand perspective of the
information stored in the data warehouse.
A. Business metadata.
B. Technical metadata.
C. Operational metadata.
D. Financial metadata.
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The correct answer is: A
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82. _______________ helps to integrate, maintain and view the contents of the data warehousing system.
A. Business directory.
B. Information directory.
C. Data dictionary.
D. Database.
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: B
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83. Discovery of cross-sales opportunities is called ________________.
A. segmentation.
B. visualization.
C. correction.
D. association.
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The correct answer is: D
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84. Data marts that incorporate data mining tools to extract sets of data are called ______.
A. independent data mart.
B. dependent data marts.
C. intra-entry data mart.
D. inter-entry data mart.
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: B
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85. ____________ can generate programs itself, enabling it to carry out new tasks.
A. Automated system.
B. Decision making system.
C. Self-learning system.
D. Productivity system.
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The correct answer is: D
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86. The power of self-learning system lies in __________.
A. cost.
B. speed.
C. accuracy.
D. simplicity.
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The correct answer is: C
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87. Building the informational database is done with the help of _______.
A. transformation or propagation tools.
B. transformation tools only.
C. propagation tools only.
D. extraction tools.
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The correct answer is: A
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88. How many components are there in a data warehouse?
A. two.
B. three.
C. four.
D. five.
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The correct answer is: D
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89. Which of the following is not a component of a data warehouse?
A. Metadata.
B. Current detail data.
C. Lightly summarized data.
D. Component Key.
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The correct answer is: D
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90. ________ is data that is distilled from the low level of detail found at the current detailed leve.
A. Highly summarized data.
B. Lightly summarized data.
C. Metadata.
D. Older detail data.
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The correct answer is: B
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91. Highly summarized data is _______.
A. compact and easily accessible.
B. compact and expensive.
C. compact and hardly accessible.
D. compact.
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The correct answer is: A
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92. A directory to help the DSS analyst locate the contents of the data warehouse is seen in ______.
A. Current detail data.
B. Lightly summarized data.
C. Metadata.
D. Older detail data.
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: C
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93. Metadata contains atleast _________.
A. the structure of the data.
B. the algorithms used for summarization.
C. the mapping from the operational environment to the data warehouse.
D. all of the above.
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The correct answer is: D
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94. Which of the following is not a old detail storage medium?
A. Phot Optical Storage.
B. RAID.
C. Microfinche.
D. Pen drive.
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The correct answer is: D
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95. The data from the operational environment enter _______ of data warehouse.
A. Current detail data.
B. Older detail data.
C. Lightly summarized data.
D. Highly summarized data.
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The correct answer is: A
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96. The data in current detail level resides till ________ event occurs.
A. purge.
B. summarization.
C. archieved.
D. all of the above.
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The correct answer is: D
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97. The dimension tables describe the _________.
A. entities.
B. facts.
C. keys.
D. units of measures.
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The correct answer is: B
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98. The granularity of the fact is the _____ of detail at which it is recorded.
A. transformation.
B. summarization.
C. level.
D. transformation and summarization.
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The correct answer is: C
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99. Which of the following is not a primary grain in analytical modeling?
A. Transaction.
B. Periodic snapshot.
C. Accumulating snapshot.
D. All of the above.
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The correct answer is: B
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100. Granularity is determined by ______.
A. number of parts to a key.
B. granularity of those parts.
C. both A and B.
D. none of the above.
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The correct answer is: C
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101. ___________ of data means that the attributes within a given entity are fully dependent on the entire
primary key of the entity.
A. Additivity.
B. Granularity.
C. Functional dependency.
D. Dimensionality.
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The correct answer is: C
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102. A fact is said to be fully additive if ___________.
A. it is additive over every dimension of its dimensionality.
B. additive over atleast one but not all of the dimensions.
C. not additive over any dimension.
D. None of the above.
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The correct answer is: A
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103. A fact is said to be partially additive if ___________.
A. it is additive over every dimension of its dimensionality.
B. additive over atleast one but not all of the dimensions.
C. not additive over any dimension.
D. None of the above.
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The correct answer is: B
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104. A fact is said to be non-additive if ___________.
A. it is additive over every dimension of its dimensionality.
B. additive over atleast one but not all of the dimensions.
C. not additive over any dimension.
D. None of the above.
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The correct answer is: C
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105. Non-additive measures can often combined with additive measures to create new _________.
A. additive measures.
B. non-additive measures.
C. partially additive.
D. All of the above.
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The correct answer is: A
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106. A fact representing cumulative sales units over a day at a store for a product is a _________.
A. additive fact.
B. fully additive fact.
C. partially additive fact.
D. non-additive fact.
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: B
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107. ____________ of data means that the attributes within a given entity are fully dependent on the entire
primary key of the entity.
A. Additivity.
B. Granularity.
C. Functional Dependency.
D. Dependency.
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The correct answer is: C
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108. Which of the following is the other name of Data mining?
A. Exploratory data analysis.
B. Data driven discovery.
C. Deductive learning.
D. All of the above.
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The correct answer is: D
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109. Which of the following is a predictive model?
A. Clustering.
B. Regression.
C. Summarization.
D. Association rules.
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The correct answer is: B
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110. Which of the following is a descriptive model?
A. Classification.
B. Regression.
C. Sequence discovery.
D. Association rules.
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The correct answer is: C
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111. A ___________ model identifies patterns or relationships.
A. Descriptive.
B. Predictive.
C. Regression.
D. Time series analysis.
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The correct answer is: A
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112. A predictive model makes use of ________.
A. current data.
B. historical data.
C. both current and historical data.
D. assumptions.
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The correct answer is: B
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113. ____________ maps data into predefined groups.
A. Regression.
B. Time series analysis
C. Prediction.
D. Classification.
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The correct answer is: D
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114. __________ is used to map a data item to a real valued prediction variable.
A. Regression.
B. Time series analysis.
C. Prediction.
D. Classification.
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: B
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115. In ____________, the value of an attribute is examined as it varies over time.
A. Regression.
B. Time series analysis.
C. Sequence discovery.
D. Prediction.
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: B
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116. In ________ the groups are not predefined.
A. Association rules.
B. Summarization.
C. Clustering.
D. Prediction.
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: C
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117. Link Analysis is otherwise called as ___________.
A. affinity analysis.
B. association rules.
C. both A & B.
D. Prediction.
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The correct answer is: C
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118. _________ is a the input to KDD.
A. Data.
B. Information.
C. Query.
D. Process.
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The correct answer is: A
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119. The output of KDD is __________.
A. Data.
B. Information.
C. Query.
D. Useful information.
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The correct answer is: D
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120. The KDD process consists of ________ steps.
A. three.
B. four.
C. five.
D. six.
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The correct answer is: C
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121. Treating incorrect or missing data is called as ___________.
A. selection.
B. preprocessing.
C. transformation.
D. interpretation.
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The correct answer is: B
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122. Converting data from different sources into a common format for processing is called as ________.
A. selection.
B. preprocessing.
C. transformation.
D. interpretation.
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The correct answer is: C
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123. Various visualization techniques are used in ___________ step of KDD.
A. selection.
B. transformaion.
C. data mining.
D. interpretation.
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The correct answer is: D
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124. Extreme values that occur infrequently are called as _________.
A. outliers.
B. rare values.
C. dimensionality reduction.
D. All of the above.
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The correct answer is: A
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125. Box plot and scatter diagram techniques are _______.
A. Graphical.
B. Geometric.
C. Icon-based.
D. Pixel-based.
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The correct answer is: B
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126. __________ is used to proceed from very specific knowledge to more general information.
A. Induction.
B. Compression.
C. Approximation.
D. Substitution.
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: A
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127. Describing some characteristics of a set of data by a general model is viewed as ____________
A. Induction.
B. Compression.
C. Approximation.
D. Summarization.
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: B
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128. _____________ helps to uncover hidden information about the data.
A. Induction.
B. Compression.
C. Approximation.
D. Summarization.
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: C
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129. _______ are needed to identify training data and desired results.
A. Programmers.
B. Designers.
C. Users.
D. Administrators.
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The correct answer is: C
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130. Overfitting occurs when a model _________.
A. does fit in future states.
B. does not fit in future states.
C. does fit in current state.
D. does not fit in current state.
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The correct answer is: B
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131. The problem of dimensionality curse involves ___________.
A. the use of some attributes may interfere with the correct completion of a data mining task.
B. the use of some attributes may simply increase the overall complexity.
C. some may decrease the efficiency of the algorithm.
D. All of the above.
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: D
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132. Incorrect or invalid data is known as _________.
A. changing data.
B. noisy data.
C. outliers.
D. missing data.
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: B
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133. ROI is an acronym of ________.
A. Return on Investment.
B. Return on Information.
C. Repetition of Information.
D. Runtime of Instruction
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: A
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134. The ____________ of data could result in the disclosure of information that is deemed to be
confidential.
A. authorized use.
B. unauthorized use.
C. authenticated use.
D. unauthenticated use.
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: B
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135. ___________ data are noisy and have many missing attribute values.
A. Preprocessed.
B. Cleaned.
C. Real-world.
D. Transformed.
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: C
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136. The rise of DBMS occurred in early ___________.
A. 1950’s.
B. 1960’s
C. 1970’s
D. 1980’s.
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: C
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137. SQL stand for _________.
A. Standard Query Language.
B. Structured Query Language.
C. Standard Quick List.
D. Structured Query list.
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: B
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138. Which of the following is not a data mining metric?
A. Space complexity.
B. Time complexity.
C. ROI.
D. All of the above.
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: D
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139. Reducing the number of attributes to solve the high dimensionality problem is called as ________.
A. dimensionality curse.
B. dimensionality reduction.
C. cleaning.
D. Overfitting.
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: B
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140. Data that are not of interest to the data mining task is called as ______.
A. missing data.
B. changing data.
C. irrelevant data.
D. noisy data.
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: C
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141. ______ are effective tools to attack the scalability problem.
A. Sampling.
B. Parallelization
C. Both A & B.
D. None of the above.
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: C
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142. Market-basket problem was formulated by __________.
A. Agrawal et al.
B. Steve et al.
C. Toda et al.
D. Simon et al.
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: A
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143. Data mining helps in __________.
A. inventory management.
B. sales promotion strategies.
C. marketing strategies.
D. All of the above.
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: D
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144. The proportion of transaction supporting X in T is called _________.
A. confidence.
B. support.
C. support count.
D. All of the above.
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: B
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145. The absolute number of transactions supporting X in T is called ___________.
A. confidence.
B. support.
C. support count.
D. None of the above.
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: C
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146. The value that says that transactions in D that support X also support Y is called ______________.
A. confidence.
B. support.
C. support count.
D. None of the above.
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: A
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147. If T consist of 500000 transactions, 20000 transaction contain bread, 30000 transaction contain jam,
10000 transaction contain both bread and jam. Then the support of bread and jam is _______.
A. 2%
B. 20%
C. 3%
D. 30%
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: A
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148. 7 If T consist of 500000 transactions, 20000 transaction contain bread, 30000 transaction contain jam,
10000 transaction contain both bread and jam. Then the confidence of buying bread with jam is _______.
A. 33.33%
B. 66.66%
C. 45%
D. 50%
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: D
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149. The left hand side of an association rule is called __________.
A. consequent.
B. onset.
C. antecedent.
D. precedent.
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: C
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150. The right hand side of an association rule is called _____.
A. consequent.
B. onset.
C. antecedent.
D. precedent.
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: A
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151. Which of the following is not a desirable feature of any efficient algorithm?
A. to reduce number of input operations.
B. to reduce number of output operations.
C. to be efficient in computing.
D. to have maximal code length.
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: D
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152. All set of items whose support is greater than the user-specified minimum support are called as
_____________.
A. border set.
B. frequent set.
C. maximal frequent set.
D. lattice.
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: B
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153. If a set is a frequent set and no superset of this set is a frequent set, then it is called ________.
A. maximal frequent set.
B. border set.
C. lattice.
D. infrequent sets.
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: A
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154. Any subset of a frequent set is a frequent set. This is ___________.
A. Upward closure property.
B. Downward closure property.
C. Maximal frequent set.
D. Border set.
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: B
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155. Any superset of an infrequent set is an infrequent set. This is _______.
A. Maximal frequent set.
B. Border set.
C. Upward closure property.
D. Downward closure property.
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: C
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156. If an itemset is not a frequent set and no superset of this is a frequent set, then it is _______.
A. Maximal frequent set
B. Border set.
C. Upward closure property.
D. Downward closure property.
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: B
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157. A priori algorithm is otherwise called as __________.
A. width-wise algorithm.
B. level-wise algorithm.
C. pincer-search algorithm.
D. FP growth algorithm.
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: B
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158. The A Priori algorithm is a ___________.
A. top-down search.
B. breadth first search.
C. depth first search.
D. bottom-up search.
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: D
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159. The first phase of A Priori algorithm is _______.
A. Candidate generation.
B. Itemset generation.
C. Pruning.
D. Partitioning.
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The correct answer is: A
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160. The second phaase of A Priori algorithm is ____________.
A. Candidate generation.
B. Itemset generation.
C. Pruning.
D. Partitioning.
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The correct answer is: C
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161. The _______ step eliminates the extensions of (k-1)-itemsets which are not found to be frequent, from
being considered for counting support.
A. Candidate generation.
B. Pruning.
C. Partitioning.
D. Itemset eliminations.
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The correct answer is: B
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162. The a priori frequent itemset discovery algorithm moves _______ in the lattice.
A. upward.
B. downward.
C. breadthwise.
D. both upward and downward.
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The correct answer is: A
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163. After the pruning of a priori algorithm, _______ will remain.
A. Only candidate set.
B. No candidate set.
C. Only border set.
D. No border set.
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The correct answer is: B
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164. The number of iterations in a priori ___________.
A. increases with the size of the maximum frequent set.
B. decreases with increase in size of the maximum frequent set.
C. increases with the size of the data.
D. decreases with the increase in size of the data.
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The correct answer is: A
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165. MFCS is the acronym of _____.
A. Maximum Frequency Control Set.
B. Minimal Frequency Control Set.
C. Maximal Frequent Candidate Set.
D. Minimal Frequent Candidate Set.
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The correct answer is: C
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166. Dynamuc Itemset Counting Algorithm was proposed by ____.
A. Bin et al.
B. Argawal et at.
C. Toda et al.
D. Simon et at.
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The correct answer is: A
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167. Itemsets in the ______ category of structures have a counter and the stop number with them.
A. Dashed.
B. Circle.
C. Box.
D. Solid.
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The correct answer is: A
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168. The itemsets in the _______category structures are not subjected to any counting.
A. Dashes.
B. Box.
C. Solid.
D. Circle.
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The correct answer is: C
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169. Certain itemsets in the dashed circle whose support count reach support value during an iteration
move into the ______.
A. Dashed box.
B. Solid circle.
C. Solid box.
D. None of the above.
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The correct answer is: A
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170. Certain itemsets enter afresh into the system and get into the _______, which are essentially the
supersets of the itemsets that move from the dashed circle to the dashed box.
A. Dashed box.
B. Solid circle.
C. Solid box.
D. Dashed circle.
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The correct answer is: D
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171. The itemsets that have completed on full pass move from dashed circle to ________.
A. Dashed box.
B. Solid circle.
C. Solid box.
D. None of the above.
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The correct answer is: B
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172. The FP-growth algorithm has ________ phases.
A. one.
B. two.
C. three.
D. four.
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The correct answer is: B
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173. A frequent pattern tree is a tree structure consisting of ________.
A. an item-prefix-tree.
B. a frequent-item-header table.
C. a frequent-item-node.
D. both A & B.
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The correct answer is: D
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174. The non-root node of item-prefix-tree consists of ________ fields.
A. two.
B. three.
C. four.
D. five.
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The correct answer is: B
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175. The frequent-item-header-table consists of __________ fields.
A. only one.
B. two.
C. three.
D. four.
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The correct answer is: B
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176. The paths from root node to the nodes labelled ‘a’ are called __________.
A. transformed prefix path.
B. suffix subpath.
C. transformed suffix path.
D. prefix subpath.
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The correct answer is: D
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177. The transformed prefix paths of a node ‘a’ form a truncated database of pattern which co-occur with a
is called _______.
A. suffix path.
B. FP-tree.
C. conditional pattern base.
D. prefix path.
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The correct answer is: C
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178. The goal of _____ is to discover both the dense and sparse regions of a data set.
A. Association rule.
B. Classification.
C. Clustering.
D. Genetic Algorithm.
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The correct answer is: C
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179. Which of the following is a clustering algorithm?
A. A priori.
B. CLARA.
C. Pincer-Search.
D. FP-growth.
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The correct answer is: B
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180. _______ clustering technique start with as many clusters as there are records, with each cluster having
only one record.
A. Agglomerative.
B. divisive.
C. Partition.
D. Numeric.
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The correct answer is: A
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181. __________ clustering techniques starts with all records in one cluster and then try to split that cluster
into small pieces.
A. Agglomerative.
B. Divisive.
C. Partition.
D. Numeric.
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The correct answer is: B
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182. Which of the following is a data set in the popular UCI machine-learning repository?
A. CLARA.
B. CACTUS.
C. STIRR.
D. MUSHROOM.
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The correct answer is: D
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183. In ________ algorithm each cluster is represented by the center of gravity of the cluster.
A. k-medoid.
B. k-means.
C. STIRR.
D. ROCK.
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The correct answer is: B
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184. In ___________ each cluster is represented by one of the objects of the cluster located near the
center.
A. k-medoid.
B. k-means.
C. STIRR.
D. ROCK.
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The correct answer is: A
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185. Pick out a k-medoid algoithm.
A. DBSCAN.
B. BIRCH.
C. PAM.
D. CURE.
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The correct answer is: C
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186. Pick out a hierarchical clustering algorithm.
A. DBSCAN
B. BIRCH.
C. PAM.
D. CURE.
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The correct answer is: A
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187. CLARANS stands for _______.
A. CLARA Net Server.
B. Clustering Large Application RAnge Network Search.
C. Clustering Large Applications based on RANdomized Search.
D. CLustering Application Randomized Search.
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The correct answer is: C
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188. BIRCH is a ________.
A. agglomerative clustering algorithm.
B. hierarchical algorithm.
C. hierarchical-agglomerative algorithm.
D. divisive.
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The correct answer is: C
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189. The cluster features of different subclusters are maintained in a tree called ___________.
A. CF tree.
B. FP tree.
C. FP growth tree.
D. B tree.
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The correct answer is: A
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190. The ________ algorithm is based on the observation that the frequent sets are normally very few in
number compared to the set of all itemsets.
A. A priori.
B. Clustering.
C. Association rule.
D. Partition.
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The correct answer is: D
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191. The partition algorithm uses _______ scans of the databases to discover all frequent sets.
A. two.
B. four.
C. six.
D. eight.
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The correct answer is: A
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192. The basic idea of the apriori algorithm is to generate________ item sets of a particular size & scans
the database.
A. candidate.
B. primary.
C. secondary.
D. superkey.
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The correct answer is: A
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193. ________is the most well known association rule algorithm and is used in most commercial products.
A. Apriori algorithm.
B. Partition algorithm.
C. Distributed algorithm.
D. Pincer-search algorithm.
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The correct answer is: A
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194. An algorithm called________is used to generate the candidate item sets for each pass after the first.
A. apriori.
B. apriori-gen.
C. sampling.
D. partition.
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The correct answer is: B
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195. The basic partition algorithm reduces the number of database scans to ________ & divides it into
partitions.
A. one.
B. two.
C. three.
D. four.
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The correct answer is: B
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196. ___________and prediction may be viewed as types of classification.
A. Decision.
B. Verification.
C. Estimation.
D. Illustration.
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The correct answer is: C
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197. ___________can be thought of as classifying an attribute value into one of a set of possible classes.
A. Estimation.
B. Prediction.
C. Identification.
D. Clarification.
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The correct answer is: B
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198. Prediction can be viewed as forecasting a_________value.
A. non-continuous.
B. constant.
C. continuous.
D. variable.
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The correct answer is: C
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199. _________data consists of sample input data as well as the classification assignment for the data.
A. Missing.
B. Measuring.
C. Non-training.
D. Training.
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The correct answer is: D
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200. Rule based classification algorithms generate ______ rule to perform the classification.
A. if-then.
B. while.
C. do while.
D. switch.
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The correct answer is: A
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201. ____________ are a different paradigm for computing which draws its inspiration from neuroscience.
A. Computer networks.
B. Neural networks.
C. Mobile networks.
D. Artificial networks.
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The correct answer is: B
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202. The human brain consists of a network of ___________.
A. neurons.
B. cells.
C. Tissue.
D. muscles.
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The correct answer is: A
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203. Each neuron is made up of a number of nerve fibres called _____________.
A. electrons.
B. molecules.
C. atoms.
D. dendrites.
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The correct answer is: D
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204. The ___________is a long, single fibre that originates from the cell body.
A. axon.
B. neuron.
C. dendrites.
D. strands.
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The correct answer is: A
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205. A single axon makes ___________ of synapses with other neurons.
A. ones.
B. hundreds.
C. thousands.
D. millions.
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The correct answer is: C
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206. _____________ is a complex chemical process in neural networks.
A. Receiving process.
B. Sending process.
C. Transmission process.
D. Switching process.
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The correct answer is: C
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207. _________ is the connectivity of the neuron that give simple devices their real power. a. b. c. d.
A. Water.
B. Air.
C. Power.
D. Fire.
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The correct answer is: D
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208. __________ are highly simplified models of biological neurons.
A. Artificial neurons.
B. Computational neurons.
C. Biological neurons.
D. Technological neurons.
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The correct answer is: A
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209. The biological neuron’s _________ is a continuous function rather than a step function.
A. read.
B. write.
C. output.
D. input.
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The correct answer is: C
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210. The threshold function is replaced by continuous functions called ________ functions.
A. activation.
B. deactivation.
C. dynamic.
D. standard.
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The correct answer is: A
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211. The sigmoid function also knows as __________functions.
A. regression.
B. logistic.
C. probability.
D. neural.
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The correct answer is: B
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212. MLP stands for ______________________.
A. mono layer perception.
B. many layer perception.
C. more layer perception.
D. multi layer perception.
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The correct answer is: D
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213. In a feed- forward networks, the conncetions between layers are ___________ from input to output.
A. bidirectional.
B. unidirectional.
C. multidirectional.
D. directional.
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The correct answer is: B
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214. The network topology is constrained to be __________________.
A. feedforward.
B. feedbackward.
C. feed free.
D. feed busy.
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The correct answer is: A
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215. RBF stands for _____________.
A. Radial basis function.
B. Radial bio function.
C. Radial big function.
D. Radial bi function.
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The correct answer is: A
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216. RBF have only _______________ hidden layer.
A. four.
B. three.
C. two.
D. one.
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The correct answer is: D
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217. RBF hidden layer units have a receptive field which has a ____________; that is, a particular input
value at which they have a maximal output.
A. top.
B. bottom.
C. centre.
D. border.
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The correct answer is: C
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218. ___________ training may be used when a clear link between input data sets and target output values
does not exist.
A. Competitive.
B. Perception.
C. Supervised.
D. Unsupervised.
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The correct answer is: D
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219. ___________ employs the supervised mode of learning.
A. RBF.
B. MLP.
C. MLP & RBF.
D. ANN.
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The correct answer is: C
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220. ________________ design involves deciding on their centres and the sharpness of their Gaussians.
A. DR.
B. AND.
C. XOR.
D. RBF.
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: D
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221. ___________ is the most widely applied neural network technique.
A. ABC.
B. PLM.
C. LMP.
D. MLP.
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: D
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222. SOM is an acronym of _______________.
A. self-organizing map.
B. self origin map.
C. single organizing map.
D. simple origin map.
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The correct answer is: A
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223. ____________ is one of the most popular models in the unsupervised framework.
A. SOM.
B. SAM.
C. OSM.
D. MSO.
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: A
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224. The actual amount of reduction at each learning step may be guided by _________.
A. learning cost.
B. learning level.
C. learning rate.
D. learning time.
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The correct answer is: C
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225. The SOM was a neural network model developed by ________.
A. Simon King.
B. Teuvokohonen.
C. Tomoki Toda.
D. Julia.
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: B
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226. SOM was developed during ____________.
A. 1970-80.
B. 1980-90.
C. 1990 -60.
D. 1979 -82.
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: D
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227. Investment analysis used in neural networks is to predict the movement of _________ from previous
data.
A. engines.
B. stock.
C. patterns.
D. models.
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: B
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228. SOMs are used to cluster a specific _____________ dataset containing information about the patient’s
drugs etc.
A. physical.
B. logical.
C. medical.
D. technical.
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: C
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229. GA stands for _______________.
A. Genetic algorithm
B. Gene algorithm.
C. General algorithm.
D. Geo algorithm.
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: A
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230. GA was introduced in the year __________.
A. 1955.
B. 1965.
C. 1975.
D. 1985.
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: C
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231. Genetic algorithms are search algorithms based on the mechanics of natural_______.
A. systems.
B. genetics.
C. logistics.
D. statistics.
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: B
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232. GAs were developed in the early _____________.
A. 1970.
B. 1960.
C. 1950.
D. 1940.
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: A
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233. The RSES system was developed in ___________.
A. Poland.
B. Italy.
C. England.
D. America.
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: A
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234. Crossover is used to _______.
A. recombine the population’s genetic material.
B. introduce new genetic structures in the population.
C. to modify the population’s genetic material.
D. All of the above.
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: A
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235. The mutation operator ______.
A. recombine the population’s genetic material.
B. introduce new genetic structures in the population.
C. to modify the population’s genetic material.
D. All of the above.
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: B
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236. Which of the following is an operation in genetic algorithm?
A. Inversion.
B. Dominance.
C. Genetic edge recombination.
D. All of the above.
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: D
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237. . ___________ is a system created for rule induction.
A. RBS.
B. CBS.
C. DBS.
D. LERS.
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: D
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238. NLP stands for _________.
A. Non Language Process.
B. Nature Level Program.
C. Natural Language Page.
D. Natural Language Processing.
[bg_collapse view=”button-green” color=”#FFF” icon=”arrow” expand_text=”Show Answer” collapse_text=”Hide Answer” ] Feedback
The correct answer is: D
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239. Web content mining describes the discovery of useful information from the _______contents.
A. text.
B. web.
C. page.
D. level.
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The correct answer is: B
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240. Research on mining multi-types of data is termed as _______ data.
A. graphics.
B. multimedia.
C. meta.
D. digital.
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The correct answer is: B
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241. _______ mining is concerned with discovering the model underlying the link structures of the web.
A. Data structure.
B. Web structure.
C. Text structure.
D. Image structure.
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The correct answer is: B
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242. _________ is the way of studying the web link structure.
A. Computer network.
B. Physical network.
C. Social network.
D. Logical network.
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The correct answer is: C
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243. The ________ propose a measure of standing a node based on path counting.
A. open web.
B. close web.
C. link web.
D. hidden web.
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The correct answer is: B
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244. In web mining, _______ is used to find natural groupings of users, pages, etc.
A. clustering.
B. associations.
C. sequential analysis.
D. classification.
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The correct answer is: A
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245. In web mining, _________ is used to know the order in which URLs tend to be accessed.
A. clustering.
B. associations.
C. sequential analysis.
D. classification.
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The correct answer is: C
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246. In web mining, _________ is used to know which URLs tend to be requested together.
A. clustering.
B. associations.
C. sequential analysis.
D. classification.
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The correct answer is: B
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247. __________ describes the discovery of useful information from the web contents.
A. Web content mining.
B. Web structure mining.
C. Web usage mining.
D. All of the above.
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The correct answer is: A
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248. _______ is concerned with discovering the model underlying the link structures of the web.
A. Web content mining.
B. Web structure mining.
C. Web usage mining.
D. All of the above.
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The correct answer is: B
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249. The ___________ engine for a data warehouse supports query-triggered usage of data
A. NNTP
B. SMTP
C. OLAP
D. POP
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The correct answer is: C
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250. ________ displays of data such as maps, charts and other graphical representation allow data to be
presented compactly to the users.
A. Hidden
B. Visual
C. Obscured
D. Concealed
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The correct answer is: B
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