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Exam2pass > CompTIA > CompTIA Certifications > XK0-005 > XK0-005 Online Practice Questions and Answers

XK0-005 Online Practice Questions and Answers

Questions 4

The administrator comptia is not able to perform privileged functions on a newly deployed system. Given the following command outputs:

Which of the following is the reason that the administrator is unable to perform the assigned duties?

A. The administrator needs a password reset.

B. The administrator is not a part of the correct group.

C. The administrator did not update the sudo database.

D. The administrator's credentials need to be more complex.

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Correct Answer: B

The reason that the administrator is unable to perform the assigned duties is because the administrator is not a part of the correct group. This is option B. Based on the image that you sent, I can see that the user comptia has a user ID and a

group ID of 1000, and belongs to only one group, which is also comptia. However, the sudoers file, which defines the permissions for users to run commands as root or other users, does not include the comptia group in any of the entries.

Therefore, the user comptia cannot use sudo to perform privileged functions on the system.

The other options are incorrect because:

A. The administrator needs a password reset.

This is not true, because the password aging information for the user comptia shows that the password was last changed on Oct 24, 2023, and it does not expire until Jan 22, 2024. There is no indication that the password is locked or expired.

C. The administrator did not update the sudo database. This is not necessary, because the sudo database is automatically updated whenever the sudoers file is modified. There is no separate command to update the sudo database. D. The

administrator's credentials need to be more complex. This is not relevant, because the complexity of the credentials does not affect the ability to use sudo. The sudoers file does not specify any password policy for the users or groups that are

allowed to use sudo.

Questions 5

An administrator runs ping comptia.org. The result of the command is:

ping: comptia.org: Name or service not known

Which of the following files should the administrator verify?

A. /etc/ethers

B. /etc/services

C. /etc/resolv.conf

D. /etc/sysctl.conf

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Correct Answer: C

The best file to verify when the ping command returns the error "Name or service not known" is C. /etc/resolv.conf. This file contains the configuration for the DNS resolver, which is responsible for translating domain names into IP addresses.

If this file is missing, corrupted, or has incorrect entries, the ping command will not be able to resolve the domain name and will fail with the error. To fix this issue, the administrator should check that the file exists, has proper permissions, and

has valid nameserver entries. For example, a typical /etc/resolv.conf file may look like this:

nameserver 8.8.8.8 nameserver 8.8.4.4

These are the IP addresses of Google's public DNS servers, which can be used as a fallback option if the default DNS servers are not working.

Questions 6

A developer has been unable to remove a particular data folder that a team no longer uses. The developer escalated the issue to the systems administrator. The following output was received: Which of the following commands can be used to resolve this issue?

A. chgrp -R 755 data/

B. chmod -R 777 data/

C. chattr -R -i data/

D. chown -R data/

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Correct Answer: C

Explanation: The command that can be used to resolve the issue of being unable to remove a particular data folder is chattr -R -i data/. This command will use the chattr utility to change file attributes on a Linux file system. The -R option means that chattr will recursively change attributes of directories and their contents. The -i option means that chattr will remove (unset) the immutable attribute from files or directories. When a file or directory has the immutable attribute set, it cannot be modified, deleted, or renamed. The other options are not correct commands for resolving this issue. The chgrp -R 755 data/ command will change the group ownership of data/ and its contents recursively to 755, which is not a valid group name. The chgrp command is used to change group ownership of files or directories. The chmod -R 777 data/ command will change the file mode bits of data/ and its contents recursively to 777, which means that everyone can read, write, and execute them. However, this will not remove the immutable attribute, which prevents deletion or modification regardless of permissions. The chmod command is used to change file mode bits of files or directories. The chown -R data/ command is incomplete and will produce an error. The chown command is used to change the user and/or group ownership of files or directories, but it requires at least one argument besides the file name. References: CompTIA Linux+ (XK0-005) Certification Study Guide, Chapter 7: Managing Disk Storage; chattr(1) - Linux manual page; chgrp(1) - Linux manual page; chmod(1) - Linux manual page; chown(1) - Linux manual page

Questions 7

A systems administrator is receiving tickets from users who cannot reach the application app that should be listening on port 9443/tcp on a Linux server.

To troubleshoot the issue, the systems administrator runs netstat and receives the following output:

Based on the information above, which of the following is causing the issue?

A. The IP address 0.0.0.0 is not valid.

B. The application is listening on the loopback interface.

C. The application is listening on port 1234.

D. The application is not running.

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Correct Answer: B

Explanation: The server is in a "Listen" state on port 9943 using its loopback address. The "1234" is a process-id

The cause of the issue is that the application is listening on the loopback interface. The loopback interface is a virtual network interface that is used for internal communication within the system. The loopback interface has the IP address 127.0.0.1, which is also known as localhost. The netstat output shows that the application is listening on port 9443 using the IP address 127.0.0.1. This means that the application can only accept connections from the same system, not from other systems on the network. This can prevent the users from reaching the application and cause the issue. The administrator should configure the application to listen on the IP address 0.0.0.0, which means all available interfaces, or on the specific IP address of the system that is reachable from the network. This will allow the application to accept connections from other systems and resolve the issue. The cause of the issue is that the application is listening on the loopback interface. This is the correct answer to the question. The other options are incorrect because they are not supported by the outputs. The IP address 0.0.0.0 is valid and means all interfaces, the application is not listening on port 1234, and the application is running as shown by the process ID 1234. References: CompTIA Linux+ (XK0-005) Certification Study Guide, Chapter 12: Managing Network Connections, page 383.

Questions 8

A senior Linux administrator has created several scripts that will be used to install common system applications. These scripts are published to a reposito-ry to share with the systems team. A junior Linux administrator needs to re-trieve the scripts and make them available on a local workstation. Which of the following Git commands should the junior Linux administrator use to accom-plish this task?

A. fetch

B. checkout

C. clone

D. branch

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Correct Answer: C

To retrieve the scripts from a repository and make them available on a local workstation, the junior Linux administrator can use the command git clone ? This will create a copy of the repository on the local machine, including all the scripts and

history. The other commands will not clone the repository, but either fetch, checkout, or branch from an existing repository. References:

[CompTIA Linux+ Study Guide], Chapter 10: Working with Git, Section: Cloning Repositories with Git

[How to Clone a Git Repository]

Questions 9

A Linux administrator needs to create a new user named user02. However, user02 must be in a different home directory, which is under /comptia/projects. Which of the following commands will accomplish this task?

A. useradd -d /comptia/projects user02

B. useradd -m /comptia/projects user02

C. useradd -b /comptia/projects user02

D. useradd -s /comptia/projects user02

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Correct Answer: A

Explanation: The command useradd -d /comptia/projects user02 will accomplish the task of creating a new user named user02 with a different home directory. The useradd command is a tool for creating new user accounts on Linux systems. The - d option specifies the home directory for the new user, which is the directory where the user's personal files and settings are stored. The /comptia/projects is the path of the home directory for the new user, which is different from the default location of /home/user02. The user02 is the name of the new user. The command useradd -d /comptia/projects user02 will create a new user named user02 with a home directory under /comptia/projects. This is the correct command to use to accomplish the task. The other options are incorrect because they either do not specify the home directory for the new user (useradd -m /comptia/projects user02 or useradd -s /comptia/projects user02) or do not use the correct option for the home directory (useradd -b /comptia/projects user02 instead of useradd -d /comptia/projects user02). References: CompTIA Linux+ (XK0-005) Certification Study Guide, Chapter 13: Managing Users and Groups, page 403.

Questions 10

A systems administrator made some changes in the ~/.bashrc file and added an alias command. When the administrator tried to use the alias command, it did not work. Which of the following should be executed FIRST?

A. source ~/.bashrc

B. read ~/.bashrc

C. touch ~/.bashrc

D. echo ~/.bashrc

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Correct Answer: A

Explanation: The command source ~/.bashrc should be executed first to use the alias command. The source command reads and executes commands from a file in the current shell environment. The ~/.bashrc file is a configuration file that contains commands and aliases that are executed when a new bash shell is started. The administrator made some changes in the ~/.bashrc file and added an alias command, but the changes are not effective until the file is sourced or a new shell is started. The command source ~/.bashrc will reload the file and make the alias command available. The other options are incorrect because they either do not execute the commands in the file (read, touch, or echo) or do not affect the current shell environment (read or echo). References: CompTIA Linux+ (XK0-005) Certification Study Guide, Chapter

9: Working with the Linux Shell, page 295.

Questions 11

An administrator attempts to rename a file on a server but receives the following error.

The administrator then runs a few commands and obtains the following output:

Which of the following commands should the administrator run NEXT to allow the file to be renamed by any user?

A. chgrp reet files

B. chacl -R 644 files

C. chown users files

D. chmod -t files

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Correct Answer: D

Explanation: The command that the administrator should run NEXT to allow the file to be renamed by any user is chmod -t files. This command uses the chmod tool, which is used to change file permissions and access modes. The -t option removes (or sets) the sticky bit on a directory, which restricts deletion or renaming of files within that directory to only their owners or root. In this case, since files is a directory with sticky bit set (indicated by t in drwxrwxrwt), removing it will allow any user to rename or delete files within that directory. The other options are not correct commands for allowing any user to rename files within files directory. The chgrp reet files command will change the group ownership of files directory to reet, but it will not affect its permissions or access modes. The chacl -R 644 files command is invalid, as chacl is used to change file access control lists (ACLs), not permissions or access modes. The chown users files command will change the user ownership of files directory to users, but it will not affect its permissions or access modes. References: CompTIA Linux+ (XK0-005) Certification Study Guide, Chapter 8: Managing Users and Groups; chmod(1) - Linux manual page

Questions 12

A systems administrator is investigating an issue in which one of the servers is not booting up properly. The journalctl entries show the following:

Which of the following will allow the administrator to boot the Linux system to normal mode quickly?

A. Comment out the /opt/app filesystem in /etc/fstab and reboot.

B. Reformat the /opt/app filesystem and reboot.

C. Perform filesystem checks on local filesystems and reboot.

D. Trigger a filesystem relabel and reboot.

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Correct Answer: A

Explanation: The fastest way to boot the Linux system to normal mode is to comment out the /opt/app filesystem in /etc/fstab and reboot. This will prevent the system from trying to mount the /opt/app filesystem at boot time, which causes an error because the filesystem does not exist or is corrupted. Commenting out a line in /etc/fstab can be done by adding a # symbol at the beginning of the line. Rebooting the system will apply the changes and allow the system to boot normally. Reformatting the /opt/app filesystem will not help to boot the system, as it will erase any data on the filesystem and require manual intervention to create a new filesystem. Performing filesystem checks on local filesystems will not help to boot the system, as it will not fix the missing or corrupted /opt/app filesystem. Triggering a filesystem relabel will not help to boot the system, as it will only change the security context of files and directories according to SELinux policy. References: CompTIA Linux+ (XK0- 005) Certification Study Guide, Chapter 14: Managing Disk Storage, page 456.

Questions 13

HotsPot

A new drive was recently added to a Linux system. Using the environment and tokens provided, complete the following tasks:

Create an appropriate device label.

Format and create an ext4 file system on the new partition. The current working directory is /.

Hot Area:

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Correct Answer:

Exam Code: XK0-005
Exam Name: CompTIA Linux+
Last Update: Jun 06, 2025
Questions: 396

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