Virtualization Technologies Questions and Answers

Q: The given diagram represents which of the following scenario ?

The diagram shows a Type 2 Hypervisor or virtual machine monitor.In the stack, the hypervisor sits on top of an operating system that runs on the hardware, and a guest operating system with its application runs on top of the hypervisor. A hypervisor that runs as a program on a host operating system is a Type 2 (hosted) hypervisor, as with VirtualBox or VMware Workstation.A Type 1 (bare-metal) hypervisor would sit directly on the hardware with no host operating system below it. There are no standard Type 3 or Type 4 hypervisors.

Q: In virtual cluster management "templates" can be implemented using :

Templates are implemented using the COW (copy on write) format.In virtual cluster management (as described by Hwang, Fox and Dongarra), a template virtual machine image is shared, and new virtual machines are created from it using copy-on-write disks: each VM writes its changes to its own small layer while reading unchanged blocks from the template, which makes deployment fast and saves storage.'Skip and relay' and 'copy and relay' are not image formats, and NOW (network of workstations) is a kind of cluster, not a way of implementing templates.

Q: While virtualizing X-86 architecture with "hardware assisted virtualization" which of the following is true ?

The true statement is that privileged and sensitive calls are automatically trapped to the hypervisor.The original x86 architecture had sensitive instructions that did not trap when run in user mode, which made classic trap-and-emulate virtualization impossible. Hardware-assisted virtualization (Intel VT-x, AMD-V) adds a new CPU mode for the hypervisor, so that privileged and sensitive instructions executed by a guest automatically trap to it.Binary translation is the software technique used for full virtualization before such hardware support, and paravirtualization modifies the guest operating system to make hypercalls instead. The Application Binary Interface is not the trapping mechanism.

31.

Five boxes stacked from top to bottom and joined by two-way arrows: Application, Operating system, Hypervisor, Operating system, Hardware

The given diagram represents which of the following scenario ?

A.Type 1 Hypervisor or virtual machine monitor
B.Type 2 Hypervisor or virtual machine monitor
C.Type 3 Hypervisor or virtual machine monitor
D.Type 4 Hypervisor or virtual machine monitor

Exam Year(s)

MH SET - 2020, SET Exam - 2020,

Answer: B

The diagram shows a Type 2 Hypervisor or virtual machine monitor.

In the stack, the hypervisor sits on top of an operating system that runs on the hardware, and a guest operating system with its application runs on top of the hypervisor. A hypervisor that runs as a program on a host operating system is a Type 2 (hosted) hypervisor, as with VirtualBox or VMware Workstation.

A Type 1 (bare-metal) hypervisor would sit directly on the hardware with no host operating system below it. There are no standard Type 3 or Type 4 hypervisors.

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32.

In virtual cluster management "templates" can be implemented using :

A.Skip and relay format
B.Copy and relay format
C.NOW (newtor of workstation) format
D.COW (copy on write) format

Exam Year(s)

MH SET - 2020, SET Exam - 2020,

Answer: D

Templates are implemented using the COW (copy on write) format.

In virtual cluster management (as described by Hwang, Fox and Dongarra), a template virtual machine image is shared, and new virtual machines are created from it using copy-on-write disks: each VM writes its changes to its own small layer while reading unchanged blocks from the template, which makes deployment fast and saves storage.

'Skip and relay' and 'copy and relay' are not image formats, and NOW (network of workstations) is a kind of cluster, not a way of implementing templates.

Discuss in Forum

33.

While virtualizing X-86 architecture with "hardware assisted virtualization" which of the following is true ?

A.Priviledged and sensitive calls are automatically trapped to the hypervisor
B.Is done using binary translation
C.Is done using paravirtualization
D.Priviledged and sensitive calls are trapped using Application Binary Interface (ABI)

Exam Year(s)

MH SET - 2021, SET Exam - 2021,

Answer: A

The true statement is that privileged and sensitive calls are automatically trapped to the hypervisor.

The original x86 architecture had sensitive instructions that did not trap when run in user mode, which made classic trap-and-emulate virtualization impossible. Hardware-assisted virtualization (Intel VT-x, AMD-V) adds a new CPU mode for the hypervisor, so that privileged and sensitive instructions executed by a guest automatically trap to it.

Binary translation is the software technique used for full virtualization before such hardware support, and paravirtualization modifies the guest operating system to make hypercalls instead. The Application Binary Interface is not the trapping mechanism.

Discuss in Forum

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