CV0-004 Troubleshooting Practice Question
A cloud engineer is troubleshooting a storage performance issue. The storage is backed by a SAN with a mix of SSD and HDD drives. Which of the following metrics would BEST indicate that the storage subsystem is the bottleneck?
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
✓
High disk queue depth and latency
High disk queue depth and latency directly indicate that I/O requests are waiting, which is a classic sign of a storage bottleneck. Low memory usage (A) does not indicate a storage issue. High network utilization (B) could be caused by storage traffic but does not confirm the storage subsystem is the bottleneck; it could be normal. High CPU utilization (D) points to compute, not storage.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Low memory usage on the hypervisor
Why it's wrong here
Low memory does not indicate storage bottleneck.
- ✗
High network utilization on storage network links
Why it's wrong here
Network utilization may be high but not necessarily a bottleneck if storage can handle.
- ✓
High disk queue depth and latency
Why this is correct
Queue depth over 2-3 per disk with high latency indicates storage bottleneck.
- ✗
High CPU utilization on all application servers
Why it's wrong here
High CPU could be due to many reasons, not necessarily storage.
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JA
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.