A server with 32 GB of RAM is running a critical application. The administrator runs `free -h` and sees the following: total=31G, used=29G, free=1.5G, shared=200M, buff/cache=1.2G, available=2.8G. The application is reporting out-of-memory errors. What is the MOST likely cause?

The kernel is not reclaiming memory fast enough.

The application is consuming too much memory and the system is under memory pressure.

The buff/cache is too low and needs to be increased.

A server has 8 GB of RAM and 2 GB of swap. The administrator sees in `vmstat` that `si` and `so` are consistently above 500. The server runs a web application that uses 6 GB of RAM. The administrator wants to reduce swapping without adding hardware. Which action is MOST effective?

Reduce the web application's memory footprint.

CompTIALinux+

Domain 5Objective 5

Performance XK0-006 Practice Questions (Page 5)

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 21–24

21application · medium
A server with 32 GB of RAM is running a critical application. The administrator runs `free -h` and sees the following: total=31G, used=29G, free=1.5G, shared=200M, buff/cache=1.2G, available=2.8G. The application is reporting out-of-memory errors. What is the MOST likely cause?
Select an answer first
22foundation · easy
Which command is used to change the scheduling priority of a running process, which can help improve system response times for critical tasks?
Select an answer first
23foundation · easy
Which command displays a summary of memory usage, including total, used, and free memory, as well as swap space?
Select an answer first
24expert · hard
A server has 8 GB of RAM and 2 GB of swap. The administrator sees in `vmstat` that `si` and `so` are consistently above 500. The server runs a web application that uses 6 GB of RAM. The administrator wants to reduce swapping without adding hardware. Which action is MOST effective?
Select an answer first

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Performance XK0-006 Practice Questions (Page 5)

Questions 21–24

A server with 32 GB of RAM is running a critical application. The administrator runs `free -h` and sees the following: total=31G, used=29G, free=1.5G, shared=200M, buff/cache=1.2G, available=2.8G. The application is reporting out-of-memory errors. What is the MOST likely cause?

Which command is used to change the scheduling priority of a running process, which can help improve system response times for critical tasks?

Which command displays a summary of memory usage, including total, used, and free memory, as well as swap space?

A server has 8 GB of RAM and 2 GB of swap. The administrator sees in `vmstat` that `si` and `so` are consistently above 500. The server runs a web application that uses 6 GB of RAM. The administrator wants to reduce swapping without adding hardware. Which action is MOST effective?

Keep studying — Troubleshooting