CompTIA XK0-004 Training Tools 2021

NEW QUESTION 1
Which of the following is the purpose of the vmlinux file on a Linux system?

• A. To prevent a Linux kernel panic
• B. To start a Linux virtual machine
• C. To provide the executable kernel for the system
• D. To enable resource access to the network

Answer: C

NEW QUESTION 2
A Linux systems administrator needs to set permissions on an application with the following parameters: The owner of the application should be able to read, write, and execute the application.
Members of the group should be able to read and execute the application. Everyone else should not have access to the application.
Which of the following commands would BEST accomplish these tasks?

• A. chmod 710 <application name>
• B. chmod 730 <application name>
• C. chmod 750 <application name>
• D. chmod 760 <application name>

Answer: D

NEW QUESTION 3
A Linux administrator built a GitLab server. Later that day, a software engineer tried to access the server to upload the repository during the final step of installation. The software engineer could not access the website. Which of the following firewall rules would allow access to this site?

• A. iptables –A INPUT –p tcp –m multiport --dports 80,443 –m conntrack –cstate NEW, ESTABLISHED –j ACCEPT
• B. iptables –A INPUT –p tcp –m multiport --dports 80,443 –m conntrack –cstate ESTABLISHED –j ACCEPT
• C. iptables –A INPUT –p tcp –m multiport --dports 80,443 –m conntrack –cstate RELATED, ESTABLISHED –j ACCEPT
• D. iptables –A INPUT –p tcp –m multiport --dports 80,443 –m conntrack –cstate NEW, ESTABLISHED –j REJECT

Answer: C

NEW QUESTION 4
A junior administrator of a physical server receives log messages indicating the out-of-memory killer has been active. All memory slots are in use on the motherboard, but additional disk space is available. Space has been allocated for a swap file.
Which of the following should the administrator use to reduce the output of memory messages?

• A. free : swapoff / swapfile ; swapon -a
• B. mkswap /swapfile; swapon –a
• C. fallocate –l 2G /swapfile && swapon –a
• D. echo “1” > /proc/meninfo ; swapon / swapfile

Answer: A

NEW QUESTION 5
The lead Linux has added a disk, /dev/sdd, to a VM that is running out of disk space. Place the following steps in the correct order from first (1) to last (4) to add the disk to the existing LVM.

• A. Mastered
• B. Not Mastered

Answer: A

Explanation:

NEW QUESTION 6
After starting a long-running script, a systems administrator needs to verify the frequency of what is filling up the /var partition and kill it because it is consuming too much space.
Which of the following is the correct sequence given only a terminal is available?

• A. 1. CTRL-C2. bg3. watch df /var4. CTRL-C5. fg6. CTRL-Z
• B. 1. CTRL-C2. fg3. watch df /var4. CTRL-Z5. bg6. CTRL-Z
• C. 1. CTRL-Z2. bg3. watch df /var4. CTRL-C5. fg6. CTRL-C
• D. 1. CTRL-Z2. bg3. watch df /var4. CTRL-Z5. fg6. CTRL-C

Answer: D

NEW QUESTION 7
After installing a new web server, you are unable to browse to the default web page. INSTRUCTIONS
Review all the command output and select the command needed to remediate the issue.
If at any time you would like to bring back the initial state of the simulation, please click the Reset All button.

• A. Mastered
• B. Not Mastered

Answer: A

Explanation:

NEW QUESTION 8
An administrator needs to change the IP address on a server remotely. After updating the configuration files, a network restart is needed. However, the administrator fears that when the network connection drops, the network restart script will be killed before the new IP address has been set.
Which of the following commands would prevent the script from being killed?

• A. nohup service network restart
• B. service network restart &
• C. echo “service network restart” | at now
• D. dg service network restart

Answer: A

NEW QUESTION 9
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.

Answer: B

NEW QUESTION 10
Which of the following statements BEST represents what the term “agentless” means regarding orchestration?

• A. Installation of a tool is not required on the remote system to perform orchestration tasks
• B. It facilitates version control when using infrastructure as code during orchestration
• C. It automatically removes malware from the remote system during orchestration
• D. A tool can only be accessed remotely to perform orchestration tasks

Answer: A

NEW QUESTION 11
A Linux storage administrator wants to create a logical volume group. Which of the following commands is required to start the process?

• A. pvcreate
• B. vgcreate
• C. lvcreate
• D. mkfs.xfs

Answer: B

NEW QUESTION 12
A systems administrator has finished building a new feature for the monitoring software in a separate Git branch.
Which of the following is the BEST method for adding the new feature to the software’s master branch?

• A. Merge the changes from the feature branch to the master branch.
• B. Save the changes to the master branch automatically with each Git commit.
• C. Clone the feature branch into the master branch.
• D. Pull the changes from the feature branch into the master branch.

Answer: A

NEW QUESTION 13
An administrator needs to deploy 100 identical CentOS workstations via PXE boot. Which of the following should the administrator use to minimize the amount of interaction with the consoles needed?

• A. Kickstart script
• B. Ghost image on a distribution server
• C. Hard disk duplicator
• D. Hard disk duplicator
• E. Ubiquity script

Answer: A

NEW QUESTION 14
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

Answer: D

NEW QUESTION 15
Two specific users need access to a directory owned by root where backups are located. Which of the following commands would BEST ensure the specified users can access the backup files?

• A. umask
• B. chcon
• C. chmod
• D. setfacl

Answer: D

NEW QUESTION 16
A new corporate policy states that Bluetooth should be disabled on all company laptops. Which of the following commands would disable the use of Bluetooth?

• A. echo “blacklist bluetooth” > /etc/modprobe.d/blacklist-bluetooth
• B. echo “kill bluetooth” > /etc/modprobe.d/kill-bluetooth
• C. echo “modprobe bluetooth” > /etc/modprobe.d/modprbe-bluetooth
• D. echo “rmod bluetooth” > /etc/modprobe.d/rmmod-bluetooth

Answer: C

NEW QUESTION 17
A junior Linux administrator is installing patches using YUM. The administrator issues the following command:
yum list installed
The output of the command is as follows:

Given this scenario and the output, which of the following should the administrator do to address this issue?

• A. renice –n 9 –p 5180
• B. killall yum
• C. ps –ef | grep yum
• D. top | grep yum

Answer: C

NEW QUESTION 18
A junior systems is configuring localization option environment variables. The administrator is given a checklist of tasks with the following requirements:
View current settings of the LC_ALL environment variable only. Modify the LANG environment variable to US English Unicode.
Given this scenario, which of the following should be performed to meet these requirements? (Choose two.)

• A. echo $LC_ALL
• B. locale
• C. cat $LC_ALL
• D. export LANG = en_US.UTF-8
• E. export $LANG = en_US.UTF
• F. stty

Answer: BD

NEW QUESTION 19
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

Answer: B

NEW QUESTION 20
A Linux administrator needs to schedule a cron job to run at 1:15 p.m. every Friday to report the amount of free disk space on the system and to send the output to a file named “freespace”. Which of the following would meet this requirement?

• A. 13 15 * * 5 df > /freespace
• B. 15 13 * * 5 df > /freespace
• C. 15 1 * * 6 df > /freespace
• D. 15 13 6 * * df > /freespace

Answer: A

NEW QUESTION 21
A member of the production group issues the following command:
echo "Monday through Friday" > /production_docs/days
The command fails to execute, so the user obtains the following output: drwxr--r-- root production 0 Jun 16 2021 production
-rw-r--r-- production production 4096 Jun 14 2021 days
Which of the following commands should the user execute to BEST fix the issue?

• A. chmod g+w production to change the permissions of the days file
• B. chgrp root production_docs/days to change the group ownership of the production_docs/ days file
• C. chmod g+S production to set the GUID on the production_docs directory
• D. chown production to change the ownership of the production_docs directory

Answer: D

NEW QUESTION 22
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