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CV0-004 Practice Question: A cloud administrator notices that a virtual…
A cloud administrator notices that a virtual machine running a critical application is using 95% CPU consistently. The application is single-threaded and performance is degraded. Which action should the administrator take to resolve the issue?
⚠ Common exam trap
CompTIA often tests the misconception that adding more vCPUs always improves performance, but for single-threaded workloads, higher clock speed is the correct solution, not vCPU count.
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
✓
Migrate the VM to a host with a higher CPU clock speed.
The application is single-threaded, meaning it can only utilize one CPU core at a time. Increasing the CPU clock speed directly improves the processing speed of that single thread, which resolves the performance degradation. Option C is correct because migrating to a host with a higher CPU clock speed provides a faster core for the single-threaded workload.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Deploy additional VMs and load balance the application.
Why it's wrong here
Single-threaded app cannot be distributed.
- ✗
Increase the RAM allocation to the VM.
Why it's wrong here
CPU is the bottleneck, not memory.
- ✓
Migrate the VM to a host with a higher CPU clock speed.
Why this is correct
Higher clock speed improves single-threaded performance.
- ✗
Increase the number of vCPUs assigned to the VM.
Why it's wrong here
The application is single-threaded; more vCPUs won't help.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CV0-004 practice question is part of Courseiva's free CompTIA 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 CV0-004 exam.