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CompTIA XK0-004 Exam Actual Questions

The questions for XK0-004 were last updated at Aug. 7, 2022.
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  • Viewing questions 1-10 out of 328 questions

Topic 1 - Single Topic

Question #1 Topic 1

Which of the following would be the BEST solution for a systems administrator to access the graphical user environment of a Linux machine remotely?

  • A. VNC
  • B. KDE
  • C. X11
  • D. RPC
Reveal Solution Hide Solution   Discussion   4

Correct Answer: A 🗳️
Reference:
https://www.sfu.ca/computing/about/support/tips/remote-to-linux-with-gui.html

Question #2 Topic 1

A technical support engineer receives a ticket from a user who is trying to create a 1KB file in the /tmp directory and is getting the following error: No space left on device. The support engineer checks the /tmp directory, and it has 20GB of free space.
Which of the following BEST describes a possible cause for this error?

  • A. The /tmp directory is not mounted.
  • B. The filesystem is formatted with a 4MB block size.
  • C. the filesystem ran out of inodes.
  • D. The /tmp directory has been set with an immutable attribute.
Reveal Solution Hide Solution   Discussion   2

Correct Answer: C 🗳️
Reference:
https://www.maketecheasier.com/fix-linux-no-space-left-on-device-error/

Question #3 Topic 1

Which of the following is the BEST reason for not storing database files in the /var directory?

  • A. The /var filesystem is not fast enough for database files.
  • B. The number of files in /var is limited by the available inodes.
  • C. Files in /var do not have strict file permissions.
  • D. If log files fill up /var, it might corrupt the database.
Reveal Solution Hide Solution   Discussion   2

Correct Answer: D 🗳️

Question #4 Topic 1

SIMULATION -
A junior system administrator had trouble installing and running an Apache web server on a Linux server. You have been tasked with installing the Apache web server on the Linux server and resolving the issue that prevented the junior administrator from running Apache.

INSTRUCTIONS -
Install Apache and start the service. Verify that the Apache service is running with the defaults.
Typing ג€helpג€ in the terminal will show a list of relevant commands.
If at any time you would like to bring back the initial state of the simulation, please click the Reset All button.

CentOS Command Prompt -

Reveal Solution Hide Solution   Discussion   1

Correct Answer: See explanation below

Question #5 Topic 1

DRAG DROP -
The lead Linux admin has added a disk, /dev/sdd, to a VM that is running out of disk space. Place the following steps in the correct order from first (1) to last (4) to add the disk to the existing LVM.
Select and Place:

Reveal Solution Hide Solution   Discussion  

Correct Answer:
Reference:
https://www.rootusers.com/how-to-increase-the-size-of-a-linux-lvm-by-expanding-the-virtual-machine-disk/

Question #6 Topic 1

An administrator receives a warning about a filesystem filling up, and then identifies a large file located at /tmp/largelogfile. The administrator deletes the file, but no space is recovered on the filesystem.
Which of the following commands would BEST assists the administrator in identifying the problem?

  • A. lsof | grep largelogfile
  • B. pkill /tmp/largelogfile
  • C. pgrep largelogfile
  • D. ps ג€"ef | grep largelogfile
Reveal Solution Hide Solution   Discussion   2

Correct Answer: A 🗳️
Reference:
https://access.redhat.com/solutions/2316

Question #7 Topic 1

Which of the following can be used to boot a DVD from a remote device to initialize a Linux system setup on bare metal hardware as if it is a local DVD?

  • A. UEFI
  • B. PXE
  • C. NFS
  • D. GRUB
Reveal Solution Hide Solution   Discussion   12

Correct Answer: A 🗳️
Reference:
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/6/html/installation_guide/ch-boot-x86

Question #8 Topic 1

After starting a long-running script, a systems administrator needs to verify the frequency of what is filling up the /var partition and kill it because it is consuming too much space.
Which of the following is the correct sequence given only a terminal is available?

  • A. 1. CTRL-C 2. bg 3. watch df /var 4. CTRL-C 5. fg 6. CTRL-Z
  • B. 1. CTRL-C 2. fg 3. watch df /var 4. CTRL-Z 5. bg 6. CTRL-Z
  • C. 1. CTRL-Z 2. bg 3. watch df /var 4. CTRL-C 5. fg 6. CTRL-C
  • D. 1. CTRL-Z 2. bg 3. watch df /var 4. CTRL-Z 5. fg 6. CTRL-C
Reveal Solution Hide Solution   Discussion   8

Correct Answer: D 🗳️

Question #9 Topic 1

A Linux administrator must identify a user with high disk usage. The administrator runs the # du ג€"s /home/* command and gets the following output:

Based on the output, User3 has the largest amount of disk space used. To clean up the file space, the administrator needs to find out more information about the specific files that are using the most disk space.
Which of the following commands will accomplish this task?

  • A. df ג€"k /home/User3/files.txt
  • B. du ג€"a /home/User3/*
  • C. du ג€"sh /home/User/
  • D. find . ג€"name /home/User3 -print
Reveal Solution Hide Solution   Discussion   10

Correct Answer: C 🗳️
Reference:
https://unix.stackexchange.com/questions/37221/finding-files-that-use-the-most-disk-space

Question #10 Topic 1

A Linux server has multiple IPs. A Linux administrator needs to verify if the HTTP server port is bound to the correct IP.
Which of the following commands would BEST accomplish this task?

  • A. route
  • B. host
  • C. nslookup
  • D. netstat
  • E. ip
Reveal Solution Hide Solution   Discussion   2

Correct Answer: D 🗳️
Reference:
https://www.tecmint.com/find-listening-ports-linux/

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