Citrix Xen Server Interview Questions

Citrix Xen Server Interview Questions

Question
How the boot disk is identified when we start XenServer from SAN boot?
Answer
The san boot info is stored in the BIOS of HBA
 
Question
In order to integrate Active Directory authentication with a XenServer host what kind of DNS setting should be used?
 
Answer
The same DNS server is used for both the AD server and Xenserver host
 
Question
 
What DHCP options must an administrator configure for a target device to start up without PXE using a bootstrap file?
Answer
66 and 67 need to be selected.
 
Question
How a Windows Vdisk can be used by multiple target devices in Standard Image mode to prepare the Windows server for physical to virtual conversion?
Answer
need to optimize the vdisk
 
Question
Can you please explain the upgrade process of Xen Server host
Answer
 
Download the update and then Shut down, suspend or migrate the virtual machines running on the host then only you may proceed with the update process.
 
Question
 
If We cloned a template into a virtual machine and then converted it back into a template, will it impact on disk performance. Can we manage the disk ?   performance.
Answer
This task may not impact our storage performance if we complete a full copy of restoration.
 
Question
How FAST clone method impact the disk performance while introducing new VMs through it?
Answer
This could have a storage impact because this process will generate a linked VHD clone disk. This means that the VM created from a template will have its disk linked to the template’s disk.
 
Question
Benifit of citrix xen server technology ?
 
Answer
This is used for Virtualization. Each Virtualization technology has its own benefits
 
Question
What is the command to change the subnet of the Xenserver hosts ?
Answer
xe pif-reconfigure-ip uuid= mode=static netmask=
 
Question
How the NTP settings can be changed at the time of migration of the XenServer so that their may not any effect on current time value.
Answer
Time zone can be changed through xsconsole.
 
Question
Which item in the Provisioning Services Console will the administrator need to configure to delete a machine account from the Active Directory domain?
Answer
Target Device
 
Question
 
How to restart a VM through CLI correctly?
Answer
Execute commands xe vm-reboot vm= or xe vm-reboot uuid=
 
Question
 
.If a resource pool in a XenServer environment in which high availability is enabled is unable to connect. How it can be recover
Answer
Run the emergency-ha-disable command, then once the host is restarted, run the pool-haenable command.
 
Question
How to restart a VM through CLI correctly?
Answer
Execute commands xe vm-reboot vm= or xe vm-reboot uuid=
 
Question
 
Can we upgrade the memory size of a Xen Server host live in production ?
Answer
yes you can,  to upgrading a memory in live env. first place the host in maint mode in the Xen Server resource pool
 
Question
How FAST clone method impact the disk performance while introducing new VMs through it?
Answer
This could have a storage impact because this process will generate a linked VHD clone disk. This means that the VM created from a template will have its disk linked to the template’s disk.
 
Question
If we want to configure a Provisioning services environment for Microsoft volume license management. Which property need to configured?
 
Answer
Target Device
 
Question
What DHCP options must an administrator configure for a target device to start up without PXE using a bootstrap file?
 
Answer
66 and 67 need to be selected
 
Question
To add a new provisioning server to an existing farm how to configure existing virtual machines which is using the Stream Service from the new provisioning server?
 
Answer
Select Bootstrap options.
 
Question
ow to perform the virtual machine export from a remote machine?
Answer
to perform the virtual machine export, execute the command xe vm-export -h -u -pw vm= filename=
 
Question
In order to integrate Active Directory authentication with a XenServer host what kind of DNS setting should be used?
Answer
The same DNS server is used for both the Active Directory server and the XenServer host.
 
Question
If We cloned a template into a virtual machine and then converted it back into a template, will it impact on disk performance. Can we manage the disk performance.
Answer
 
This task may not impact our storage performance if we complete a full copy of restoration.
 
Question
6.2 is the latest version?
Answer
 
latest version is 6.5.1
 
Question
How to replicate the network bond on the newly connected hosts of a pool?
Answer
run the CLI command xe pool-join
 
Question
Which item in the Provisioning Services Console will the administrator need to configure to add a machine account from the Active Directory domain?
Answer
Select Bootstrap options.
 
Question
 
How to remove the specific permissions from the VM Admin user group in the situation of removing specific permissions from the users in the VM Admin Role Based Access Control group?
 
Answer
Run the xe subject-role-remove uuid= role-name=vm.pool_migrate XenServer command.
 
Question
 
/dev/sda1 partition is 4gb by default , can we increase this as I have a bulk virtual machines, working area for this is becoming low and server becoming panic ?
Answer
yes you can
 
Question
What DHCP options must an administrator configure for a target device to start up without PXE using a bootstrap file?
Answer
 
66 and 67 need to select..
 
Question
 
What is DVS controller in Xenserver?
 
Answer
DVS controller is used when an administrator needs to configure a private network between virtual machines on two hosts in a pool using XenCenter.
 
Question
To disable the auto-configure of the NIC ports of Xenservres what steps can be followed.?
 
Answer
Use the xe pif-param-set command to set other-config:ethtool-autoneg=off.
 
Question
 
Tell me how to add ISO library to Xen pool ?
Answer
yes you can mount the ISO file from Windows share through CISF.
 
Question
How to perform the virtual machine export from a remote machine?
Answer
to perform the virtual machine export, execute the command xe vm-export -h -u -pw vm= filename=
 
Question
How to move multiple virtual machines from the test resource pool into the production resource pool.
 
Answer
Need to Optimize the vDisk.
 
Question
 
To add a new group of similar computers to an existing Provisioning services farm?
 
Answer
 
use Device collection.
 
Question
how does citrix xen server bonding works?
Answer
 
through LACP
 
Question
How a Windows Vdisk can be used by multiple target devices in Standard Image mode to prepare the Windows server for physical to virtual conversion?
Answer
need to Optimize the vDisk.
 
Question
 
How to update multiple private Virtual machines images where snapshots are not being used?
Answer
We need to update each of the vDisks individually.
 
Question
 
How the boot disk is identified when we start XenServer from SAN boot?
 
Answer
The SAN boot information is sto add tored in the BIOS of the HBA
 
Question
What are the heartbeat determining mechanism for XEN HA
Answer
Xen server native HA to be used
 
Question
How Xen HA handles failure , is there any master slave concept or some other mechanism?
Answer
 
native HA.
 
NOTE:
We solve heartbeat related probs by having 2 mechanism. 1. Storage HB and NW heartbeat
 
Question
Can we combine multiple LUN’s in to one logical volume ? if yes would you please provide steps
 
Answer
Yes we can combine. there are several steps to do this. Kindly get in touch seperately on mail
 
Question
 
If we want to update the XenServer Pool with controlling the update path and the virtual machine migration, so what will be the right way to do so.?
Answer
 
Yes , you should Update each host individually starting with the pool master