VCP-DCV vSphere Architecture, Products and Solutions Practice Question
A company experiences frequent host failures. The cluster has 5 hosts with 128 GB RAM each. The VMs have vCPU and memory reservations ranging from 1 GHz/512 MB to 4 GHz/8 GB. The administrator needs to ensure that if one host fails, the remaining hosts can accommodate all VMs. Which admission control policy is recommended?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use cluster resource percentage - reserve 20% CPU and memory.
Percentage-based admission control with 20% reserve (equivalent to 1 out of 5 hosts) provides headroom for a single host failure while minimizing wasted capacity. For mixed VM sizes, slot-based admission control (Option A) can be inefficient due to varying reservation sizes. Disabling admission control (Option C) risks resource shortages during a failure. Option D reserves 25%, which is more than necessary and wastes resources.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Define slot sizes based on the largest VM.
Why it's wrong here
Slot sizing is inefficient with varying VM sizes.
- ✓
Use cluster resource percentage - reserve 20% CPU and memory.
Why this is correct
20% (1/5) ensures one host failure is tolerated efficiently.
- ✗
Disable admission control and rely on DRS.
Why it's wrong here
Disabling admission control may cause resource contention during failure.
- ✗
Use cluster resource percentage - reserve 25% CPU and memory.
Why it's wrong here
25% is too high, wasting resources.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This VCP-DCV practice question is part of Courseiva's free VMware certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the VCP-DCV exam.