CompTIA XK0-004 Online Practice Questions and Exam Preparation

CompTIA XK0-004 Online Questions & Answers

• Question 231:

  Which of the following directories contains information related to various runtime processes, such as hardware and system memory?

  A. /Usr/bin
  B. /Opt
  C. /Proc
  D. /etc/local/
  C. /Proc

• Question 232:

  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
  A. VNC

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

• Question 233:

  Joe, a user, is unable to log in to the server and contracts the systems administrator to look into the issue. The administrator examines the /etc/passwd file and discovers the following entry:

  joe:x:505:505::/home/joe:/bin/false

  Which of the following commands should the administrator execute to resolve the problem?

  A. usermod -s /bin/bash joe
  B. passwd -u joe
  C. useradd -s /bin/bash joe
  D. chage -E -1 joe
  A. usermod -s /bin/bash joe

• Question 234:

  When requesting SSH access to a remote system, a user accidentally emailed the id_rsa key to the administrator. Which of the following should the user do NEXT?

  A. Run the ssh-add command to add the remote system to known_hosts.
  B. Ask the administrator to run chmod 600 id_rsa on the remote system.
  C. Delete id_rsa key file and send the id_rsa.pub key file instead.
  D. Stop using that key and run ssh-keygen to generate a new key pair.
  D. Stop using that key and run ssh-keygen to generate a new key pair.

• Question 235:

  A user is unable to execute the command sudo su -on a newly provisioned system. Which of the following should the Linux administrator do to allow the user to execute that command?

  A. Change the user's UID to 100
  B. Add the user to the wheel group
  C. Run restorecon to update SELinux contexts
  D. Set the execute bit on the sudc command
  B. Add the user to the wheel group

• Question 236:

  A Linux administrator is testing connectivity to a remote host on a shared terminal. The administrator wants to allow other users to access the terminal while the command is executing.

  Which of the following commands should the administrator use?

  A. bg ping remotehost
  B. fg ping remotehost
  C. ping remotehost < results
  D. ping remotehost and
  C. ping remotehost < results

• Question 237:

  A Linux user needs to create a file named newfile in the home directory that mirrors the contents of the / etc/resolv.conf file.

  Which of the following commands would accomplish this task?

  A. cat /etc/resolv.conf > /home/user/newfile
  B. echo /etc/resolv.conf > /home/user/newfile
  C. grep /etc/resolv.conf < /home/user/newfile
  D. printf /etc/resolv.conf > /home/user/newfile
  A. cat /etc/resolv.conf > /home/user/newfile

• Question 238:

  An administrator uses a tool to perform roiling deployments when the production application needs to be updated. The tool temporarily removes 10% of the systems from the load balancer at a time and it pushes the newest version of the application to each system. If there are errors the tool rolls back the changes. Which of the following does this scenario BEST describe?

  A. infrastructure as code
  B. Infrastructure automation
  C. Agent-based architecture
  D. Buid automation
  E. inventory management
  A. infrastructure as code

• Question 239:

  A systems administrator configured a new kernel module, but it stopped working after reboot. Which of the following will allow the systems administrator to check for module problems during server startup?

  A. lsmod
  B. modprobe
  C. modinfo
  D. dmesg
  C. modinfo

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  Reference: https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/6/html/ deployment_guide/sec-displaying_information_about_a_module

• Question 240:

  A Systems administrator needs to examine the output of all kernel-related events since the system was booted. Which of the following would BEST display this information?

  A. dmesg
  B. modinfo
  C. systemctl
  D. logger
  A. dmesg