CompTIA CompTIA Certifications XK0-004 Questions & Answers

• Question 331:

  A systems administrator wants to deploy several applications to the same server quickly. Each application should be abstracted from the host with its own dependencies and libraries and utilize a minimal footprint. Which of the following would be BEST in this scenario?

  A. Virtual machines

  B. Type 2 hypervisor

  C. Chroot jails

  D. Containers

  Correct Answer: D

• Question 332:

  A systems administration team has decided to treat their systems as immutable instances. They keep the desired state of each of their systems in version control and apply automation whenever they provision a new instance. If there is an issue with one of their servers, instead of troubleshooting the issue, they terminate the instance and rebuild it using automation.

  Which of the following is this an example of?

  A. Inventory

  B. Orchestration

  C. Infrastructure as code

  D. Agentless deployment

  Correct Answer: C

• Question 333:

  A Linux administrator has configured a Linux system to be used as a router. The administrator confirms that two network adapters are properly installed and functioning correctly. In addition, the output of the iptables -L command appears to contain a complete firewall configuration.

  Which of the following commands does the administrator need to issue for the router to be fully functional?

  A. echo "1" > /proc/sys/net/ipv4/ip_forward

  B. echo "0" > /proc/sys/net/ipv4/tcp_abort_on_overflow

  C. echo "0" > /proc/sys/net/ipv4/max_connections

  D. echo "1" > /proc/sys/net/ipv4/ip_default_ttl

  Correct Answer: A

• Question 334:

  A systems administrator has received reports of intermittent network connectivity to a particular website. Which of the following is the BEST command to use to characterize the location and type of failure over the course of several minutes?

  A. mtr www.comptia.org

  B. tracert www.comptia.org

  C. ping www.comptia.org

  D. netstat www.comptia.org

  Correct Answer: B

  Reference: https://www.lifewire.com/traceroute-linux-command-4092586

• Question 335:

  A Linux systems administrator needs to copy the contents of a directory named "working" on the local working system to a folder /var/www/html on a server named "corporate-web". Which of the following commands will allow the administrator to copy all the contents to the web server?

  A. scp -r working/* webuser@corporate-web:/var/www/html

  B. tar working/* webuser@corporate-web:/var/www/html

  C. cp -r working/* webuser@corporate-web:/var/www/html

  D. mv working webuser@corporate-web:/var/www/html

  Correct Answer: A

  Reference: https://unix.stackexchange.com/questions/232946/how-to-copy-all-files-from-a-directory-to-a- remote-directory-using-scp

• Question 336:

  A junior Linux administrator is updating local name resolution to support IPv6. The administrator issues the command cat /etc/hosts and receives the following output:

  127.0.0.1 localhost

  Which of the following actions should the administrator perform to accomplish this task?

  A. Modify the /etc/hosts file, and add the ipv6 localhost entry to the file.

  B. Modify the /etc/hosts file, and add the ::1 localhost entry to the file.

  C. Modify the /etc/hosts file, and add the ipv4 localhost entry to the file.

  D. Modify the /etc/hosts file, and add the 0.0.0.0 localhost entry to the file.

  Correct Answer: B

• Question 337:

  A junior Linux administrator is trying to verify connectivity to the remote host host1 and display round-trip statistics for ten ICMP requests. Which of the following commands should the administrator execute?

  A. ping -c 10 host1

  B. traceroute -c 10 host1

  C. netstat host1

  D. pathping -c 10 host1

  Correct Answer: A

  Reference: https://shapeshed.com/unix-ping/

• Question 338:

  A Linux administrator needs to set permissions on an application with the following parameters:

  1.

  The owner of the application should be able to read, write, and execute the application.

  2.

  Members of the group should be able to read and execute the application.

  3.

  Everyone else should not have access to the application.

  Which of the following commands would BEST accomplish these tasks?

  A. chmod 710

  B. chmod 730

  C. chmod 750

  D. chmod 760

  Correct Answer: C

• Question 339:

  A Linux systems administrator needs to provision multiple web servers into separate regional datacenters. The systems architect has instructed the administrator to define the server infrastructure using a specific tool that consumes a text-based file.

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

  A. To document the infrastructure so it can be included in the system security plan

  B. To ensure the administrator follows the planning phase of the systems development life cycle

  C. To define the infrastructure so it can be provisioned consistently with minimal manual tasks

  D. To validate user requirements have been met within each regional datacenter for compliance

  Correct Answer: B

• Question 340:

  A junior Linux administrator is setting up system-wide configuration settings. The goal is to ensure the PATH environment variable includes the following locations for all users who log into a Linux system:

  

  The administrator issues the following commands at the terminal:

  

  Respectively, the output of these commands is as follows:

  

  Given this output, which of the following would be the BEST action for the administrator to perform to address this issue?

  A. Update the /etc/profile.d file using a text editor, navigate to the PATH element, add the missing locations, and run the bash_completion.sh script to update the changes.

  B. Update the /etc/profile file using a text editor, navigate to the PATH element, add the missing locations and run the . /etc/profile command to update the changes.

  C. Update the /etc/profile.d file using a text editor, navigate to the PATH element, add the missing locations, and reboot to update the changes.

  D. Update the /etc/profile file using a text editor navigate to the PATH element, add the missing locations, and restart the bash process to update the changes.

  Correct Answer: B