Free Practice Questions for CompTIA XK0-006 Exam

Package management troubleshooting is an important skill in Linux+ V8, especially on RPM-based distributions that use yum or dnf. When update errors reference a repository, the administrator must verify whether the repository exists and whether it is enabled.

The command yum repolist all displays all configured repositories, including those that are enabled, disabled, or temporarily unavailable. This makes it the most effective command for diagnosing repository-related issues. It allows administrators to quickly confirm the repository’s status and take corrective action, such as enabling it or fixing configuration errors.

The other options are incorrect. yum repo-pkgs manages packages within a repository but does not list repository status. yum list installed repos is not a valid yum command. yum reposync is used to mirror repositories locally and is not intended for verification.

Linux+ V8 documentation highlights yum repolist all as the standard command for repository inspection and troubleshooting.

Therefore, the correct answer is D. yum repolist all.

This scenario involves Linux file attributes and falls under the System Management domain of the CompTIA Linux+ V8 objectives. Although the administrator is operating as the root user, the system prevents the file from being modified. This behavior indicates that standard UNIX permissions are not the root cause of the problem.

The critical clue is provided by the lsattr /etc/resolv.conf output, which shows the immutable (i) attribute set on the file. When a file is marked immutable, it cannot be modified, deleted, renamed, or written to by any user, including root. This restriction overrides normal file permissions and ownership settings.

The chattr command is used to modify extended file attributes on Linux filesystems such as ext4. The option -i specifically removes the immutable attribute, restoring the file’s ability to be edited. Therefore, running chattr -i /etc/resolv.conf allows the administrator to open and modify the file successfully.

The other options do not resolve the issue. chown root changes file ownership, but the file is already owned by root. chmod 750 modifies permission bits, but permissions are ignored when the immutable attribute is set. chgrp root changes the group ownership, which also has no effect when immutability is enforced.

Linux+ V8 documentation highlights immutable files as a security and stability feature, commonly used to protect critical configuration files from accidental or unauthorized changes. Administrators must explicitly remove this attribute before making modifications.

Therefore, the correct command to allow editing the file is B. chattr -i /etc/resolv.conf.

Python 3 characteristics are part of Linux+ V8 scripting objectives. One of Python’s most important features is its modular and extensible architecture.

Option B is correct because Python 3 supports extensibility through modules and packages. Python includes a large standard library and allows developers to extend functionality using third-party modules or custom code. This makes Python highly adaptable for automation, system management, and DevOps tasks.

The other options are incorrect. Python is open source, not closed source. Python 3 is not fully backwards compatible with Python 2, which is a major distinction emphasized in Linux+ V8. Python is also not binary compatible with Java.

Linux+ V8 documentation highlights Python’s extensibility as a key reason it is widely used in Linux automation. Therefore, the correct answer is B.

To create an appropriate device label, format and create an ext4 file system on the new partition, you can use the following commands:

To create a GPT (GUID Partition Table) label on the new drive /dev/sdc, you can use the parted command with the -s option (for script mode), the device name (/dev/sdc), the mklabel command, and the label type (gpt). The command is:

parted -s /dev/sdc mklabel gpt

To create a primary partition of 10 GB on the new drive /dev/sdc, you can use the parted command with the -s option, the device name (/dev/sdc), the mkpart command, the partition type (primary), the file system type (ext4), and the start and end points of the partition (1 and 10G). The command is:

parted -s /dev/sdc mkpart primary ext4 1 10G

To format and create an ext4 file system on the new partition /dev/sdc1, you can use the mkfs command with the file system type (ext4) and the device name (/dev/sdc1). The command is:

mkfs.ext4 /dev/sdc1

You can verify that the new partition and file system have been created by using the lsblk command, which will list all block devices and their properties.

Creating backups is a core responsibility in Linux system management, and the Linux+ V8 objectives emphasize proper use of archiving and compression tools. The tar utility is the standard Linux tool for creating archive files, and it also supports compression through various options.

The command tar -cJf /backups/home.tar.xz /home/ correctly combines both archiving and compression in a single step. The -c option creates a new archive, -J specifies XZ compression, and -f allows the administrator to define the output file name. This results in a compressed archive of the entire /home/ directory, which is efficient for storage and transfer.

The other options are incorrect. cpio is an archiving tool but does not perform compression by itself without additional commands or pipelines. rsync -z compresses data during transfer but does not create an archive file. The dd command performs low-level copying of raw data and is not suitable for directory-based backups.

Linux+ V8 documentation highlights tar as the preferred utility for filesystem backups due to its flexibility, reliability, and support for multiple compression algorithms. Therefore, the correct answer is C.