CompTIA XK0-004 Online Practice Questions and Exam Preparation

CompTIA XK0-004 Online Questions & Answers

• Question 321:

  A systems administrator has retrieved the latest copy of the system backup files, which had been stored offsite at a third-party vendor. The systems administrator wants to validate that the data was not modified since the backup. Which of the following would BEST verify that the data remained the same?

  A. Perform a MD5 hash on the data.
  B. Perform a SCP from the backup.
  C. Perform rsync.
  D. Restore from the last full backup.
  A. Perform a MD5 hash on the data.

• Question 322:

  A Linux systems administrator wants the ability to access systems remotely over SSH using RSA authentication. To which of the following files should the RSA token be added to allow this access?

  A. authorized_keys
  B. ~/.ssh/ssh_config
  C. id_rsa.pub
  D. known_hosts
  C. id_rsa.pub

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  Reference: https://www.digitalocean.com/community/tutorials/how-to-configure-ssh-key-based- authentication-on-a-linux-server

• Question 323:

  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
  C. Firmware

• Question 324:

  Which of the following BEST describes the function of a DHCP server?

  A. It assigns an IP address from an allocated pool to a requesting system.
  B. It resolves assigned server hostnames to given IP addresses.
  C. It provides the ability to send and receive email for authorized users.
  D. It configures a system to use an external time source to synchronize time.
  A. It assigns an IP address from an allocated pool to a requesting system.

• Question 325:

  An administrator needs a bootable USB for installing a new Linux machine. The administrator downloaded the image file and named it as Linux_OS.iso in the /tmp directory. Which of the following commands will accomplish that task?

  A. dd input=/tmp/Linux_OS.iso of=/dev/sda bs=512
  B. dd in=/tmp/Linux_OS.iso out=/dev/sdb bs=512
  C. dd if=/tmp/Linux_OS.iso of=/dev/sda bs=512
  D. dd if=/tmp/Linux_OS.iso out=/dev/sdb1 bs=512
  C. dd if=/tmp/Linux_OS.iso of=/dev/sda bs=512

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  Reference: https://medium.com/the-blog-of-ehsan-nazim/how-to-make-linux-isos-bootable-from-usb-flash- drive-the-command-line-way-380fca04e096

• Question 326:

  Which of the following server roles is MOST appropriate to route files to multifunction devices?

  A. Proxy
  B. Router
  C. Print server
  D. Web server
  C. Print server

• Question 327:

  An administrator needs to set the time of a VM that has no network connectivity to an NTP server. The VM's host, however, is synchronized with NTP.

  Which of the following allows the administrator to synchronize the time of the VM with the host?

  A. time
  B. date
  C. hwclock
  D. ntpdate
  C. hwclock

• Question 328:

  A Linux administrator needs every new file created on a directory to maintain the group permissions of the same directory. Which of the following commands would satisfy this requirement?

  A. chmod o+s
  B. chmod u+s
  C. chmod +s
  D. chmod g+s
  D. chmod g+s

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  Reference: https://unix.stackexchange.com/questions/115631/getting-new-files-to-inherit-group- permissions-on-linux

• Question 329:

  A virtual machine logs al limes using UTC The systems administrator would like to have one script that outputs times that are in the Amenca/Chicago time zone. Which of the following would the administrator MOST likely use in the script to accounts.

  A. echo 'env TZ=America/Chicago date' >> mylog.-xt
  B. hwclock --localtime ?-mylog.txt
  C. date -d 'Tz="America/Chicago" now' >> mylog.txt
  D. timedatect1 set-timezone "America/Chicago" $$ date >> mylog.txt
  D. timedatect1 set-timezone "America/Chicago" $$ date >> mylog.txt

• Question 330:

  A Linux server needs to be accessed, but the root password is not available.

  Which of the following would BEST allow an administrator to regain access and set a new known password at the same time?

  A. Boot into single-user mode and reset the password via the passwd command.
  B. Boot into single-user mode and reset the password by editing the /etc/passwd file.
  C. Boot into single-user mode and reset the password by editing the /etc/shadow file.
  D. Boot into single-user mode and reset the password via the chage command.
  A. Boot into single-user mode and reset the password via the passwd command.

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  Reference: https://phoenixnap.com/kb/how-to-change-root-password-linux