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LFCS · Question #157
LFCS Question #157: Real Exam Question with Answer & Explanation
The correct answer is A: 0. In vmstat output, the 'so' (swap out) column indicates memory swapped from RAM to disk, and a consistent value of '0' means no processes were actively swapped out.
Submitted by lucia.co· Apr 18, 2026Operation of Running Systems
Question
In the following output, what was the maximum number of processes swapped out at any time?
Options
- A0
- B1
- C2
- D8
- E27
Explanation
In vmstat output, the 'so' (swap out) column indicates memory swapped from RAM to disk, and a consistent value of '0' means no processes were actively swapped out.
Common mistakes.
- B. This option implies that at least 1 unit of memory was swapped out, which contradicts an output that shows 0 swap out activity.
- C. This option implies that at least 2 units of memory were swapped out, which contradicts an output that shows 0 swap out activity.
- D. This option implies that at least 8 units of memory were swapped out, which contradicts an output that shows 0 swap out activity.
- E. This option implies that at least 27 units of memory were swapped out, which contradicts an output that shows 0 swap out activity.
Concept tested. vmstat swap out interpretation
Reference. https://man7.org/linux/man-pages/man8/vmstat.8.html
Topics
#vmstat#swap memory#system monitoring#process management
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