300+ TOP Windows Server 2008 R2 Desktop Virtualization Interview Questions – Answers

  1. 1. What Is Virtualization (in General)?

    Virtualization, in computing, is the creation of a virtual (rather than actual) version of something, such as a hardware platform, operating system, a storage device or network resources.

  2. 2. What Are The 4 Major Virtualization Areas?

    1. Server
    2. Storage
    3. Desktop
    4. Application

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  4. 3. Describe The Major Benefits Of Server Virtualization.

    • It helps reduce costs and saves space as you don’t need to buy additional hardware.
    • Cuts down on maintenance costs with less physical servers.
    • It offers increased security as the virtual servers are independent of one another.
    • Business continuity with high availability of your applications as another server can take over when one fails.
  5. 4. What Is The Difference Between Hosted Virtualization And Hypervisor-based Virtualization?

    Hosted virtualization products run the virtualization software on top of the host OS, which introduces additional overhead and a longer code execution path for the virtual machines (VMs) that run in the hosted virtualization environment. In contrast, hypervisor-based products such as ESX Server and Hyper-V are designed to run the hypervisor directly on the system hardware.

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  7. 5. What’s The Idea Behind Type 1 And Type 2 Methods Of Virtualization?

    Type 1-A technique used where the virtualization layer runs directly on the host’s hardware. The host and guest operating systems run on another level above the hypervisor. Examples of the type 1 hypervisor approach are VMware ESX and Xen based systems.

    Type 2-The virtualization layer runs on top of an existing operating system and is in effect a hosted application. Examples of a type 2 hypervisor are Sun’s VirtualBox, VMware Server and VMware Workstation.

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  9. 6. Talk Briefly About The History Of Microsoft-based Virtualization Products.

    After purchasing the Virtual PC software from Connectix. This was released and is still available as Microsoft Virtual Server 2005 R2

    Hyper-V was originally launched in July 2008 as an update to Windows Server 2008 and is now available as a stand-alone product (Microsoft Hyper-V Server 2008 R2) Hyper-V can also be installed on the pared down Windows Server 2008 “Core” versions.

  10. 7. What Is Hyper-v?

    Hyper-V™ is a role in Windows Server® 2008 that provides you with the tools and services you can use to create a virtualized server computing environment. This type of environment is useful because you can create and manage virtual machines, which allows you to run multiple operating systems on one physical computer and isolate the operating systems from each other.

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  12. 8. Name A Few Competitive Products That Can Be Compared (even Roughly) With Hyper-v?

    • VMware ESXi 5.0
    • Citrix XenServer 5.6 FP1
  13. 9. What Are The Major Differences Between Hyper-v Rtm And Hyper-v R2? Name Some Of The Major Differences?

    Hyper-V R2 has performance improvements in these ares:

    • Disk performance (fixed disk is now equal to underlying disk IO, and dynamic disks see significant improvement)
    • Network performance (some support for offload engines)
    • Capacity (R2 now sees increased capacity over RTM)

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  15. 10. What Are The Hardware Requirements For Hyper-v?

    Hyper-V Server 2008 is 64-bit only, that has Intel VT or AMD-V virtualization acceleration technologies enabled. Supported processors include Intel’s Pentium 4, Xeon, and Core 2 DUO, as well as AMD’s Opteron, Athlon 64, and Athlon X2. You must have DEP (Data Execution Protection) enabled (Intel XD bit or AMD NX bit). A 2 GHz or faster processor is recommended; minimum supported is 1 GHz. minimum memory requirement as 1 GB, but 2 GB or more is recommended.

  16. 11. How Many Logical Cpus Does Hyper-v R2 Support?

    Windows Server 2008, Hyper-V supported up to 16 logical processors. Update KB95670 for Server 2008 added support for up to 24 logical processors.

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  18. 12. How Much Ram Can Be Assigned To Vms In Hyper-v R2?

    The value can be set from as low as the value for Startup RAM to as high as 64 GB. However, a virtual machine can use only as much memory as the maximum amount supported by the guest operating system. For example, if you specify 64 GB for a virtual machine running a guest operating system that supports a maximum of 32 GB, the virtual machine cannot use more than 32 GB.

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  20. 13. What’s Microsoft Hyper-v Server?

    Hyper-V consists of a 64-bit hypervisor that can run 32-bit and 64-bit virtual machines concurrently. Hyper-V virtualization works with single and multi-processor virtual machines and includes tools such as snapshots, which capture the state of a running virtual machine.

  21. 14. What Types Of Network Connections Does Hyper-v Allow?

    There are three types of virtual networks that you can connect to in Hyper-V:

    • Private Virtual Network
    • Internal Virtual Network
    • External Virtual Network
  22. 15. When Building A New Hyper-v Host, What Would Your Networking Considerations Be?

    you should have at least two physical NICs on your Hyper-V server, so that there’s one for management of the Host operating system and one that you can assign to an External Virtual Network

    You should use Private Virtual Networks when you want complete isolation from both the Host operating system and the physical network

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  24. 16. Why Is It Important To Leave One Physical Nic For The Host Os?

    One for management of the Host operating system.

  25. 17. Talk About Mac Address Ranges And Potential Issues With Hyper-v Rtm. How Was This Solved In R2?

    The last byte of the address range is automatically generated with a minimum 00 and maximum FF. and causes MAC address range clashes. With Windows Server 2008 R2 we have added a new section to the Virtual Network Manager that allows you to configure the range of MAC addresses that Hyper-V will use for dynamic MAC address generation.

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  27. 18. What Are The Different Virtual Disk Options In Hyper-v?

    • Dynamically Expanding
    • Fixed
    • Differencing

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  29. 19. When Considering Performance, What Type 0f Virtual Disk Would You Use?


  30. 20. What Are Pass-through Disks?

    A pass-through disk is the term used to identify a physical disk that is not a member of a pool, but is used as a storage source in a virtual disk.

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  32. 21. Talk About Hot Adding And Hot Removing Disks In Hyper-v R2.

    Hot Add/Remove of virtual hard disks is only available on a SCSI controller of a virtual machine. You cannot hot-add on an IDE controller of a virtual machine.

  33. 22. What Are Vm Snapshots?

    A snapshot preserves the state and data of a virtual machine at a specific point in time.

    • The state includes the virtual machine’s power state (for example, powered-on, powered-off, suspended).
    • The data includes all of the files that make up the virtual machine. This includes disks, memory, and other devices, such as virtual network interface cards.
  34. 23. Talk About Performance Considerations And Other “issues” With Vm Snapshots?

    Deleting snapshots can take a long time In tests the time required to commit the snapshot is not just about the size of the snapshot file, but also about the maximum number of IOPS the disks can deliver where the snapshot and the base disk lie. Even the write rate of the VM during snapshot committing impacts the required time to clean up significantly.

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  36. 24. What’s The Difference Between Applying, Deleting And Reverting To Snapshots?

    Apply-The current state of the virtual machine and its guest operating system is captured.

    Revert-The state of the virtual machine and its guest operating system reverts back to what it was when a snapshot was taken.

    Delete-The state of the virtual machine is changed to the current state (that is, changes made after taking the snapshot are saved to the base disk).

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