CompTIA XK0-004 Online Practice Questions and Exam Preparation

CompTIA XK0-004 Online Questions & Answers

• Question 81:

  A user wants to alias dir so it always returns the contents of the ls -la command. However, the user has to reset the alias with every login. Which of the following is the BEST action the user can take to ensure the command is always available?

  A. echo "alias dir=ls -la" > /etc/profile
  B. echo "alias dir=ls -la" >> /etc/skel
  C. echo "alias dir=ls -la" >> ~/.profile
  D. echo "alias dir=ls -la" > ~/.bashrc
  C. echo "alias dir=ls -la" >> ~/.profile

• Question 82:

  A user needs to access the GUI of an application on a remote console using encrypted x-forwarding. Which of the following BEST accomplishes this?

  A. scp -X user@server "./GUIapplication.bin"
  B. ssh user@server "./GUIapplication.bin"
  C. ssh -X user@server "./GUIapplication.bin"
  D. ssh-copy-id user@server "./GUIapplication.bin"
  C. ssh -X user@server "./GUIapplication.bin"

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  Reference: https://docstore.mik.ua/orelly/networking_2ndEd/ssh/ch09_03.htm

• Question 83:

  A Linux administrator needs to disable the Sendmail service on a Linux server and prevent it from being started manually and during boot.

  Which of the following is the BEST command to do this?

  A. systemctl reset-failed sendmail
  B. systemctl mask sendmail
  C. systemctl stop sendmail
  D. systemctl disable sendmail
  C. systemctl stop sendmail

• Question 84:

  An administrator has written the following Bash script:

  

  All necessary files exist in the correct locations. However, when the administrator executes /home/user/ test.sh the following error is received:

  No such file or directory

  Which of the following is the MOST likely cause of the error?

  A. The shebang points to the wrong path.
  B. The script is not executable.
  C. The formatting of the file is incorrect.
  D. Nslookup is not installed.
  A. The shebang points to the wrong path.

• Question 85:

  An administrator needs to examine two text files and select identical lines from the files. Which of the following commands wooW BEST accomplish this task?

  A. cat report1 report2 | awk ' {print $2}' | wc -1
  B. cat report1 report2 | sort | uniq -d
  C. cat report1 report2 | grep -v < report1
  D. cat report1 report2 | sort -u | diff
  A. cat report1 report2 | awk ' {print $2}' | wc -1

• Question 86:

  Which of the following are Linux desktop managers? (Choose two.)

  A. KDE
  B. GNOME
  C. GUI
  D. VNC
  E. X11
  F. SPICE
  A. KDE
  B. GNOME

• Question 87:

  A company's httpd server has stopped working and restarting the service does not fix the issue. A junior systems administrator is investigating log files for clues. Which of the following commands should the administrator execute?

  A. journalctl -u httpd
  B. journalctl -l httpd
  C. systemctl -s httpd
  D. systemctl -l httpd
  C. systemctl -s httpd

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  Reference: https://stackoverflow.com/questions/50859732/sudo-systemctl-restart-httpd-service-not-working

• Question 88:

  A systems administrator is receiving errors while trying to install a popular virtualization software. The software specifications state the processor needs to support virtualization with Intel instructions. Additional requirements state the processor must accelerate encryption/decryption and use hyperthreading. Given the following output about the processor:

  fpu ume depse tsu msr pae mce cx8 apic sep mtrr pae mca cmov pat pse36 cflusm mmx fxsr sse sse2 ht syscall nx rdtscp lm constant_tsc rep_good nopl xtopology nonstop_tsc pni pclmulqdq ssse3 cx16 pcid sse4_1 sse4_2 x2apic popcnt aes xsave avx rdrand hypervisor lahf_lm fsgsbase

  Which of the following is the MOST likely reason for the errors?

  A. The processor supports AMD instructions rather than Intel.
  B. The processor cannot accelerate decryption.
  C. The processor does not support hyperthreading.
  D. The processor is running inside a virtual machine.
  C. The processor does not support hyperthreading.

• Question 89:

  Which of the following commands will let a Linux user know the PCI devices that are installed in the system?

  A. cat /proc/devices/pci
  B. lspci
  C. lsdev
  D. cat /proc/sys/dev
  B. lspci

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  Reference: https://opensource.com/article/19/9/linux-commands-hardware-information

• Question 90:

  A Linux administrator needs to take stock of USB devices attached to the system. Which of the following commands would be BEST to complete this task?

  A. lspci
  B. lsusb
  C. cat /proc/USB
  D. modprobe --usb
  B. lsusb

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  Reference: https://linuxhint.com/list-usb-devices-linux/