CompTIA XK0-004 Online Practice Questions and Exam Preparation

CompTIA XK0-004 Online Questions & Answers

• Question 221:

  An administrator added a disk to a virtual machine. The administrator attempts to mount the first partition with the following command:

  Mount/devsda1/mount_point

  The administrator receives the following error message:

  Mount: /mount_point: does not exist.

  Which of the following BEST solves thrs issue and allows the administrator to run the mount command?

  A. mount -a
  B. Add the mount point to /etc/ fstab
  C. mount -f /dev/sda1/mount_point
  D. mkdir/mount_point
  A. mount -a

• Question 222:

  An analyst is trying to determine which public IP addresses are managed by Company A, but the script is not working correctly.

  

  Which of the following explains what is wrong with the script?

  A. $(cat ip-list.txt) should be changed to `cat ip-list.txt` in the for statement.
  B. The for should be changed to while in the loop.
  C. The > should be changed to 2> in the do statement.
  D. The -ne flag should be changed to -eq in the if statement.
  A. $(cat ip-list.txt) should be changed to `cat ip-list.txt` in the for statement.

• Question 223:

  A Linux administrator recently changed the IP addresses of all the web servers from 10.10.50.x to 10.10.100.x. The administrator needs to update the serverlist.txt file to reflect the change.

  The file contains the following:

  10:WebSvr01:10.10.50.21:Main 11:WebSvr02:10.10.50.22:Acconting 12:WebSvr03:10.10.50.23:Intranet 20:NFS01:10.10.20.21:FileServer 30:SMTP01:10.10.30.31:Email

  Which of the following commands will change the IP addresses and update the files in place?

  A. sed 's|.50|.100|g' serverlist.txt
  B. sed -g 's|.50|.100|a' serverlist.txt
  C. sed -i 's|.50|.100|' serverlist.txt
  D. sed -i 's|.50|.100|g' serverlist.txt
  D. sed -i 's|.50|.100|g' serverlist.txt

• Question 224:

  An administrator is logged into a server remotely and wants to determine if the system is a VM. Which of the following commands would assist with this?

  A. dmesg
  B. ps
  C. top
  D. vmstat
  D. vmstat

  ---

  Reference: https://ostechnix.com/check-linux-system-physical-virtual-machine/

• Question 225:

  A Linux administrator needs to generate SSH keys for remote users. The company security policy requires at least 4096-bit encryption on all public/private key pairs. Which of the following commands should the administrator issue to comply with company policy?

  A. ssh-keygen -c 4096
  B. ssh-keygen -b 4096
  C. ssh-keygen -t rsa
  D. ssh-keygen -t dsa
  C. ssh-keygen -t rsa

  ---

  Reference: https://www.ssh.com/academy/ssh/keygen

• Question 226:

  A system administrator needs to bootstrap a series of Ubuntu images for a public provider. The administrator must ensure at the images contain the exact same updates, custom. Configure files after their first and then automatically. Which of the following tools the administrator user?

  A. Ansible
  B. Docker
  C. Cloud-init
  D. Anaconda
  B. Docker

• Question 227:

  A senior administrator keeps an important server turned off most of the time for security reasons. The server is booted for one specific function, then turned off again. Which of the following server types is described in this scenario?

  A. Proxy server
  B. Certificate authority
  C. Cloud access security broker
  D. File server
  B. Certificate authority

  ---

  Reference: https://docs.microsoft.com/en-us/windows-server/networking/core-network-guide/cncg/server-certs/server-certificate-deployment-overview

• Question 228:

  A systems administrator is using a Linux laptop to troubleshoot network devices. The administrator runs the following command:

  # screen /dev/USB0

  Which of the following does this command MOST likely accomplish?

  A. It copies the network traffic from the device connected to USB0 and screens out rejected traffic.
  B. It logs all troubleshooting output from the monitor to external USB0 storage.
  C. It monitors USB0 waiting for a network device to be connected to it as an Ethernet device.
  D. It allows the administrator to interact with the character device connected to USB0.
  D. It allows the administrator to interact with the character device connected to USB0.

• Question 229:

  The development team has automated their software build process so each time a change is submitted to the source code repository, a new software build is compiled. They are requesting that the Linux operations team look into automating the deployment of the software build into the test environment. Which of the following is the benefit to the development team for implementing deployment automation?

  A. To ensure the build commits are also deployed to the test environment
  B. To enable notifications when builds are deployed to the test environment
  C. To ensure software builds in test are not accidentally deployed to production
  D. To streamline the deployment process for deploying builds into test environments
  D. To streamline the deployment process for deploying builds into test environments

• Question 230:

  A junior Linux administrator needs to create 16 empty files quickly that will contain sales information for each quarter for the past four years. Which of the following commands will meet this requirement?

  A. touch {2015,2016,2017,2018}.{q1,q2,q3,q4}
  B. touch [2015,2016,2017,2018].[q1,q2,q3,q4]
  C. touch `2015,2016,2017,2018`.`q1,q2,q3,q4`
  D. touch {2015.2016.2017.2018}.{q1.q2.q3.q4}
  C. touch `2015,2016,2017,2018`.`q1,q2,q3,q4`