XK0-006 Troubleshooting Practice Question
A Linux administrator is troubleshooting a slow web server. They suspect high disk I/O. Which TWO commands can be used to monitor disk I/O statistics?
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 directly reports disk I/O stats; sar can collect and report I/O statistics historically.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
free -h
Why it's wrong here
free shows memory usage, not disk I/O.
- ✓
iostat -x 1
Why this is correct
iostat provides disk I/O utilization and performance metrics.
- ✗
vmstat 1
Why it's wrong here
vmstat shows system memory, CPU, and I/O wait, but not detailed per-disk stats.
- ✗
lsof
Why it's wrong here
lsof lists open files, not I/O statistics.
- ✓
sar -b 1
Why this is correct
sar -b reports I/O statistics and can be used to monitor.
Go deeper
Related to this question
About these practice questions
One of 979 original XK0-006 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 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.