SK0-005 troubleshooting Practice Question
A technician is troubleshooting a server that is experiencing high disk I/O wait times. The disk queue length is consistently above 10. Which of the following is the MOST likely cause?
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
✓
Insufficient RAM
Insufficient RAM can cause excessive paging to disk, leading to high disk I/O wait times and long queue lengths.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Insufficient RAM
Why this is correct
Correct. When RAM is low, the system uses the disk as virtual memory, increasing I/O wait and queue length.
- ✗
Disk fragmentation
Why it's wrong here
Incorrect. Fragmentation increases seek times but typically does not cause queue lengths above 10 on modern RAID arrays.
- ✗
Slow network link
Why it's wrong here
Incorrect. A slow network link would affect network throughput, not disk I/O wait times and queue length.
- ✗
Overloaded CPU
Why it's wrong here
Incorrect. High CPU utilization does not directly cause high disk I/O wait; it might indicate a bottleneck elsewhere.
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed July 2026 · checked against the official CompTIA exam blueprint
This SK0-005 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 SK0-005 exam.