LFCS Question #155: Real Exam Question with Answer & Explanation

Question

In the following output, what resource is the program being observed using the most?

Options

• ACPU
• Bmemory
• Cdisk I/O
• Dnetwork I/O

Explanation

If the output implies performance monitoring metrics related to storage, then disk I/O is the resource that the program is most heavily using.

Common mistakes.

• A. CPU usage is typically observed with tools like top or htop, displaying processor utilization and load averages.
• B. Memory usage is typically monitored with tools like free or vmstat, showing RAM consumption and swap activity.
• D. Network I/O is usually monitored with tools like netstat or iftop, which show bandwidth, packet rates, and connection statistics.

Concept tested. Interpreting disk I/O monitoring output

Reference. https://man7.org/linux/man-pages/man1/iostat.1.html

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