XK0-006 Troubleshooting Practice Question
A system is experiencing high memory usage. The administrator wants to see a brief summary of memory usage in human-readable format, including buffers and cache. Which command is most appropriate?
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
✓
free -h
free -h displays memory usage in human-readable format, including buffers and cache.
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 this is correct
Correct: free -h shows memory usage with buffers and cache.
- ✗
iostat -m
Why it's wrong here
iostat is for disk I/O, not memory.
- ✗
cat /proc/meminfo
Why it's wrong here
Shows detailed but not human-readable summary.
- ✗
vmstat -s
Why it's wrong here
vmstat -s shows memory stats but not as human-readable summary.
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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.