220-802 Question #656: Real Exam Question with Answer & Explanation

The correct answer is B: The hypervisor.. The snapshot and revert-to-snapshot feature is managed entirely by the hypervisor, which captures and restores the complete state of a virtual machine independent of the guest or host OS.

Question

Revert to snapshot is a feature of:

Options

AThe host OS.
BThe hypervisor.
CThe underlying storage.
DThe guest OS.

Explanation

The snapshot and revert-to-snapshot feature is managed entirely by the hypervisor, which captures and restores the complete state of a virtual machine independent of the guest or host OS.

Common mistakes.

A. The host OS manages physical hardware resources and scheduling but does not have visibility into individual VM states or the ability to revert them.
C. Underlying storage holds the snapshot data files on disk, but the logic to create, manage, and revert snapshots resides in the hypervisor, not the storage subsystem itself.
D. The guest OS runs inside the VM and has no awareness of or control over the snapshot mechanism managed by the hypervisor below it.

Concept tested. Hypervisor snapshot and revert functionality

Reference. https://learn.microsoft.com/en-us/windows-server/virtualization/hyper-v/manage/enable-or-disable-checkpoints-in-hyper-v

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