CompTIA CompTIA Certifications XK0-004 Questions & Answers

• Question 181:

  A Linux administrator is configuring a server to log security events for the ping command while allowing the request to occur. The Linux server is using AppArmor to manage its security services. Which of the following commands is the BEST option?

  A. aa-complain /bin/ping

  B. aa-disable /bin/ping

  C. aa-unconfined /bin/ping

  D. aa-enforce /bin/ping

  Correct Answer: D

• Question 182:

  After cloning a remote repository, a new feature of that project needs to be developed and integrated into the next major release. Which of the following is the first Git operation to run to begin working on this new feature immediately after the clone?

  A. merge

  B. init

  C. diff

  D. branch

  Correct Answer: A

• Question 183:

  While trying to access a website hosted on the server, the systems administrator receives the following error message:

  

  The administrator then performs some diagnostics:

  

  Which of the following commands should the administrator use to fix the issue?

  A. chown -R www:www /var/www/website

  B. chcon -t httpd_sys_content_t /etc/httpd

  C. chmod -R 777 /var/www/website

  D. restorecon /var/www/html/website/index.html

  Correct Answer: A

• Question 184:

  A systems administrator logs into a Linux server and must identify whether the server is a physical or virtual machine. Which of the following commands should the administrator run?

  A. vmstat

  B. cat /proc/cpuinfo

  C. dmidecode

  D. modinfo

  Correct Answer: C

• Question 185:

  A security administrator must use a password and a token to log in to the server. Which of the following processes does this describe?

  A. Kerberos authentication

  B. RADIUS authentication

  C. Biometric authentication

  D. Multifactor authentication

  E. LDAP authentication

  Correct Answer: A

  Reference: https://doubleoctopus.com/security-wiki/authentication/ticket-granting-tickets/

• Question 186:

  A senior systems administrator wants to standardize the commands used in the department and update documentation for junior Linux administrators for using systemd. Which of the following commands replaces the old command service named stop?

  A. systemctl kill named

  B. systemctl stop named

  C. systemctl named stop

  D. systemctl named kill

  Correct Answer: C

• Question 187:

  An administrator has been able to run the uptime command on several Linux servers at once. The orchestration software that issues the command is installed on the administrator's workstation and functions without an agent. Which of the following is required on each host?

  A. SNMP community strings must be set to public

  B. The firewall must be disabled on each host

  C. The SSH daemon must be running and accessible

  D. A client must be installed on each host from the orchestration vendor

  Correct Answer: C

  Reference: https://www.tecmint.com/run-commands-on-multiple-linux-servers/

• Question 188:

  A Linux user wants to know the type A records for the domain foo.com. Which of the following commands will accomplish this task?

  A. dig type A domain foo.com

  B. nslookup set a foo.com

  C. nslookup set q A foo.com

  D. dig A foo.com

  Correct Answer: D

  Reference: https://phoenixnap.com/kb/linux-dig-command-examples

• Question 189:

  In a Linux system the first stage of the boot process is a hardware test using the BIOS. Once the hardware test is completed, control is passed to UEFI to begin the first-stage Linux boot process. To which of the following categories does UEFI belong?

  A. Software

  B. Device driver

  C. Firmware

  D. Hardware

  Correct Answer: C

• Question 190:

  After connecting a USB drive, the system is unable to detect it. There is no entry in /dev, and there is no information in the message log. Which of the following is the issue?

  A. The USB drive is formatted as a DVD

  B. The USB drive is not formatted

  C. The kernel module is not installed

  D. The permissions of /dev/usb are incorrect

  Correct Answer: B

  Reference: https://www.makeuseof.com/tag/fix-usb-device-port-linux/