A server has 4 CPU cores. The administrator notices that one core is consistently at 100% while the other three are at 10%. The process using the core is a single-threaded application. The administrator wants to improve performance. What is the BEST action?

Optimize the application to use multiple threads.

Use `nice -n -20` to give the process maximum priority.

Increase the process's priority with `renice`.

Use `taskset` to pin the process to a different core.

CompTIALinux+

Domain 5Objective 5

Performance XK0-006 Practice Questions (Page 3)

Part of the Troubleshooting domain, which accounts for 22% of the XK0-006 exam. CompTIA does not publish an official question count, but from its 90-minute exam (~35–60 total, ~8–13 in this domain), expect 2–3 from this objective — we provide 24 practice questions to prepare you well beyond it. (estimate)

24questions here

5free pages

5concepts

22%of the exam

Questions 11–15

11foundation · easy
Which command provides a snapshot of system processes and their resource usage, including CPU and memory, and is often used for one-time monitoring?
Select an answer first
12application · medium
A system administrator needs to identify which process is causing high I/O on a server. The administrator suspects a specific process but wants to confirm. Which command should the administrator use to see I/O statistics per process?
Select an answer first
13application · medium
A database server is responding slowly. The administrator runs `top` and sees a single mysqld process consistently using 95% of one CPU core, while the other cores are mostly idle. The server has 16 cores and 64 GB of RAM. Which command should the administrator run NEXT to determine whether this is a query problem or a systemic CPU issue?
Select an answer first
14foundation · easy
Which command can be used to display detailed memory usage information for each running process, including the resident set size (RSS)?
Select an answer first
15expert · hard
A server has 4 CPU cores. The administrator notices that one core is consistently at 100% while the other three are at 10%. The process using the core is a single-threaded application. The administrator wants to improve performance. What is the BEST action?
Select an answer first

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Performance XK0-006 Practice Questions (Page 3)

Questions 11–15

Which command provides a snapshot of system processes and their resource usage, including CPU and memory, and is often used for one-time monitoring?

A system administrator needs to identify which process is causing high I/O on a server. The administrator suspects a specific process but wants to confirm. Which command should the administrator use to see I/O statistics per process?

Which command can be used to display detailed memory usage information for each running process, including the resident set size (RSS)?

A server has 4 CPU cores. The administrator notices that one core is consistently at 100% while the other three are at 10%. The process using the core is a single-threaded application. The administrator wants to improve performance. What is the BEST action?

Keep studying — Troubleshooting