CompTIA CompTIA Certifications XK0-004 Questions & Answers

• Question 111:

  A user has been locked out of an account due to too many failed password attempts. Which of the following commands will unlock the user's account?

  A. pam_tally2 --user=user --reset

  B. passwd -u user -G root

  C. usermod -u user -G root

  D. chage -1 user=user --reset

  Correct Answer: A

  Reference: https://www.tecmint.com/use-pam_tally2-to-lock-and-unlock-ssh-failed-login-attempts/

• Question 112:

  A Linux administrator looks at the /etc/timezone file and determines the need to change the time zone from California to New York temporarily. Which of the following commands will accomplish this?

  A. sed -f TZ=America/New_York

  B. cat TZ=America/New_York

  C. export TZ=America/New_York

  D. printf TZ=America/New_York

  Correct Answer: C

  Reference: https://www.thegeekstuff.com/2010/09/change-timezone-in-linux/

• Question 113:

  A systems administrator notices a large number of autoloaded device modules are no longer needed and decides to do a cleanup of them. Which of the following commands will accomplish this task?

  A. rmmod -c

  B. depmod -r

  C. insmod -c

  D. modprobe -r

  Correct Answer: D

  Reference: http://ccrma.stanford.edu/planetccrma/man/man8/modprobe.8.html

• Question 114:

  A user wants to use terminal services from a Windows workstation to manage a Linux server. Which of the following should be installed on the Linux server to enable this functionality?

  A. VNC

  B. rdesktop

  C. SPICE

  D. XRDP

  Correct Answer: B

  Reference: https://www.netadmintools.com/art237.html

• Question 115:

  On a UEFI-based system, which of the following invokes GRUB2 from the EFI command prompt?

  A. boot//EFI/grub2.efi

  B. EFI/grub2.efi

  C. /boot/EFI/grub2.efi

  D. /grub2.efi

  Correct Answer: C

  Reference: https://docs.pagure.org/docs-fedora/the-grub2-bootloader.html

• Question 116:

  A user needs to modify the IP address of a laptop. Which of the following files can be used to configure the network interface named eth0?

  A. /etc/sysconfig/network/interfaces.cnf

  B. /system/config/interfaces

  C. /etc/sysconfig/network-scripts/ifcfg-eth0

  D. /system/networking/ifconfig

  E. /etc/interfaces/eth0.conf

  Correct Answer: C

  Reference: https://opensource.com/life/16/6/how-configure-networking-linux

• Question 117:

  Using which of the following control mode commands is the correct way to substitute all occurrences of / dev/sdc with /dev/sdd while editing a file in vi?

  A. :s//dev/sdc//dev/sdd

  B. :s/\/dev\/sdc/\/dev\/sdd/g

  C. :s/\/dev\/sdc/\/dev\/sdd

  D. :%s/\/dev\/sdc/\/dev\/sdd

  Correct Answer: A

• Question 118:

  A security administrator wants to display a warning banner before a user logs in. Which of the following files must be edited to make this happen?

  A. /etc/services

  B. /etc/issue

  C. /etc/hosts

  D. /etc/motd

  Correct Answer: D

  Reference: https://kerneltalks.com/tips-tricks/how-to-configure-login-banners-in-linux/

• Question 119:

  An administrator needs to look at a log for an application on a systemd-based system. There is no log for this application in /var/log. Which of the following is another way to view the application log on this system?

  A. tail -f /var/log/secure

  B. journalctl -u application

  C. systemctl application.service

  D. watch /var/lib/application/

  Correct Answer: C

• Question 120:

  Which of the following is true about Type 2 hypervisors?

  A. Type 2 hypervisors run on top of another general purpose OS.

  B. Type 2 hypervisors are often called bare-metal or native hypervisors.

  C. Type 2 hypervisors offer a performance increase to the guests in comparison to a Type 1 hypervisor.

  D. Only Type 2 hypervisors allow direct access to CPU virtualization features.

  Correct Answer: A

  Reference: https://www.sciencedirect.com/topics/computer-science/hypervisors