XK0-006 Troubleshooting Practice Question
A Linux engineer is investigating high disk I/O on a server. Which command provides disk I/O statistics including %util, await, r/s, and w/s?
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
✓
iostat -x 1
iostat reports CPU and disk I/O statistics, with columns like %util, await, r/s, and w/s.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
iostat -x 1
Why this is correct
iostat -x provides extended disk I/O stats including %util, await, r/s, w/s.
- ✗
sar -b
Why it's wrong here
sar -b shows I/O statistics but not as detailed as iostat -x.
- ✗
vmstat 1 5
Why it's wrong here
vmstat shows virtual memory, CPU, and I/O summaries but not detailed per-disk stats.
- ✗
free -h
Why it's wrong here
free -h shows memory usage, not disk I/O.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This XK0-006 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 XK0-006 exam.