CV0-004 Troubleshooting Practice Question
A company is running a database server on a virtual machine in the cloud. The database team reports that write operations are taking longer than expected. The administrator checks the disk performance metrics and sees that the average disk queue length is consistently above 10. Which action would most likely resolve this issue?
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
✓
Upgrade to a higher IOPS tier for the disk.
A high disk queue length indicates that I/O requests are waiting, meaning the disk cannot keep up with the workload. Upgrading to a higher IOPS tier provides more throughput, reducing the queue length. Option A is wrong because adding RAM might reduce the number of disk reads due to caching, but write operations still require disk I/O and RAM does not directly increase I/O throughput. Option C is wrong because increasing disk size does not inherently improve IOPS; it only adds more storage capacity. Option D is wrong because enabling compression reduces the amount of data written, which can lower I/O demand, but it does not directly address the queue length issue caused by insufficient IOPS.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Add more RAM to the virtual machine.
Why it's wrong here
Adding RAM may reduce disk hits but does not directly fix queue length.
- ✓
Upgrade to a higher IOPS tier for the disk.
Why this is correct
Upgrading IOPS tier increases throughput, reducing queue length.
- ✗
Increase the size of the disk.
Why it's wrong here
Increasing size does not guarantee higher IOPS.
- ✗
Enable compression on the database.
Why it's wrong here
Compression may reduce I/O but does not directly address queue length.
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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.