VMware vSphere 7.x Professional (VCP-DCV 2021) — Question 101

An administrator manages a vSphere environment with the following configuration:
✑ HA enabled
✑ Admission Control enabled based on fixed slot size
✑ 1 VM with a memory reservation significantly larger than the fixed slot size
The administrator notices that occasionally the VM with the memory reservation fails to restart during an HA host failure event.
What could cause this to happen?

Answer options

• A. Failover capacity is exceeded due to the memory reservation
• B. vMotion network needs more bandwidth to restart the reserved VM
• C. VMs with reservations must be in their own dedicated cluster
• D. DRS must be enabled when admission control is enabled

Correct answer: A

Explanation

The correct answer is A, as the memory reservation exceeding the failover capacity means that there aren't enough resources available to restart the VM after a failure. Option B is incorrect because while bandwidth can affect performance, it does not directly cause the VM to fail to restart. Option C is not valid since reservations do not require a separate cluster. Option D is also incorrect because DRS is not a requirement for admission control to function.