CV0-004 Troubleshooting Practice Question
A cloud administrator deploys a new application that writes logs to a block storage volume attached to a virtual machine. The application's performance degrades after a few hours. Monitoring shows that the volume's read latency is low, but write latency spikes periodically. The administrator discovers that the volume type is standard HDD. What should the administrator do to improve write performance without changing the application?
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 to a volume type with provisioned IOPS (SSD).
Standard HDD volumes have low maximum IOPS and burst performance that is quickly exhausted under sustained writes, leading to write latency spikes. Migrating to a volume type with provisioned IOPS, such as SSD, provides consistent and higher write performance without requiring application changes. Option B is incorrect because increasing the volume size does increase baseline IOPS for HDD volumes, but the improvement is marginal and still relies on burst credits, which will be depleted again. Option C is incorrect because moving logs to object storage changes the storage paradigm and would require application modifications to use different APIs. Option D is incorrect because write caching on a data volume is not recommended as it can lead to data loss in the event of a power failure, and caching is typically for read performance.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Migrate to a volume type with provisioned IOPS (SSD).
Why this is correct
Provisioned IOPS SSD provides consistent high IOPS, eliminating write spikes.
- ✗
Increase the volume size to gain higher baseline IOPS.
Why it's wrong here
Increasing size increases baseline IOPS but still uses burst credits which can deplete.
- ✗
Move the logs to an object storage service.
Why it's wrong here
Object storage is not block-level and may require application changes.
- ✗
Enable write caching on the volume.
Why it's wrong here
Write caching can cause data loss and is not recommended for data volumes.
Go deeper
Related to this question
About these practice questions
One of 977 original CV0-004 practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. Learn why practice questions differ from exam dumps →
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.