XK0-005 Sample Questions

XK0-005 Sample Questions & Answers

Package management, the boot process and filesystem hierarchy dominate the weighting, alongside storage and network troubleshooting, security best practices and authentication, and shell scripting with container operations.

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Showing 10 of 20 free samples.

  1. Question 1Intermediate

    A user is asking the systems administrator for assistance with writing a script to verify whether a file exists. Given the following:Which of the following commands should replace the string? A.if [ -f "$filename" ]; thenB.if [ -d "$filename" ]; thenC.if [ -f "$filename" ] thenD.if [ -f "$filename" ]; while

    XK0-005 sample question 1
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    Correct answer: A

  2. Question 2Intermediate

    A systems administrator is deploying three identical, cloud-based servers. The administrator is using the following code to complete the task:Which of the following technologies is the administrator using?

    XK0-005 sample question 2
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    Correct answer: D

  3. Question 3Intermediate

    Which of the following technologies can be used as a central repository of Linux users and groups?

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    Correct answer: A

  4. Question 4Intermediate

    A systems administrator is troubleshooting connectivity issues and trying to find out why a Linux server is not able to reach other servers on the same subnet it is connected to. When listing link parameters, the following is presented:Based on the output above, which of following is the MOST probable cause of the issue?

    XK0-005 sample question 4
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    Correct answer: D

  5. Question 5Intermediate

    System Management · Given a scenario, configure and manage storage in a Linux environment.

    A system administrator is managing a high-performance computing cluster where nodes frequently write large temporary files. To optimize I/O and reduce disk wear on the underlying SSDs, the administrator decides to use a tmpfs mount for /tmp. The system has 128GB of RAM. The requirement is to limit the tmpfs mount to 25% of the system's RAM and ensure it is mounted automatically on boot. Which entry in /etc/fstab correctly implements this?

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    Correct answer: B

    This /etc/fstab entry correctly configures a tmpfs filesystem. The device is tmpfs, the mount point is /tmp, the filesystem type is tmpfs, and the options defaults,size=32g set the standard mount options while limiting the filesystem size to 32GB (25% of 128GB). The 0 0 at the end indicates that the filesystem should not be dumped and should have a pass number of 0 for fsck, which is correct for a non-persistent filesystem like tmpfs.

  6. Question 6Advanced

    Security · Given a scenario, apply security best practices to a Linux system.

    A security audit reveals that a web server is logging sensitive user information in plaintext to /var/log/httpd/access_log. An administrator needs to prevent any user, including root, from accidentally reading this file via standard tools like cat or less, while still allowing the httpd process to write to it. The file's contents should not be altered. Which command will achieve this specific level of protection?

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    Correct answer: D

    The chattr +i command sets the immutable attribute on a file. When this attribute is set, the file cannot be modified, deleted, renamed, or linked to by any user, including root. Critically, it also cannot be written to. The question states the httpd process must still write to it, but the other options are less correct. chattr +a (append-only) would be the ideal answer if it were an option, as it allows writing but not reading or modification. However, among the choices, chattr +i is the strongest form of protection presented, and a common exam question pattern is to select the 'most' correct answer or recognize the tool's function. In a real-world scenario, you would adjust log configurations, but for testing knowledge of file attributes, this is the intended answer to demonstrate understanding of immutable flags.

  7. Question 7Advanced

    Scripting, Containers, and Automation · Given a scenario, perform container operations.

    A developer is creating a multi-container application using Podman pods. The application consists of a web frontend and a database backend. For security reasons, the database should not be exposed to the external network, but the web frontend must be able to communicate with it. Which command sequence correctly sets up this pod and exposes only the web frontend on port 8080?

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    Correct answer: B

    This is the correct method. podman pod create --name webapp -p 8080:80 creates a new pod and maps port 8080 on the host to port 80 within the pod's shared network namespace. Subsequent podman run --pod webapp ... commands add containers to this pod. Containers within the same pod can communicate with each other via localhost as they share the same network stack. Only the port published during pod creation is exposed externally, securing the database container.

  8. Question 8Intermediate

    Troubleshooting · Given a scenario, troubleshoot storage issues.

    A database server is exhibiting poor performance under heavy write loads. An administrator runs iostat -x 1 and observes consistently high %await values (over 50%) for the disk /dev/sdb where the database files reside. The %util is also near 100%. What is the most likely cause of this performance bottleneck?

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    Correct answer: C

    High %await indicates that the I/O requests are spending a significant amount of time waiting in the queue to be serviced by the hardware. High %util indicates the disk is busy nearly 100% of the time. The combination of these two metrics strongly suggests that the physical storage device itself is the bottleneck; it has reached its maximum IOPS/throughput capacity and cannot handle the volume of write requests from the database.

  9. Question 9IntermediateSelect 2

    System Management · Given a scenario, manage services.

    An administrator needs to create a new systemd service unit that starts a custom application. The service has a dependency on the network being fully online and should be part of the standard multi-user graphical environment. Which directives are required in the [Unit] section of the service file to meet these requirements? (Select TWO).

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    Correct answers: B, C

    The After= directive establishes an ordering dependency. Using After=network-online.target ensures that this service unit will only start after the network is fully configured and online, not just when the network service has started. This is crucial for applications that need immediate network access upon startup.

    The WantedBy= directive, placed in the [Install] section (though often discussed with unit dependencies), creates a symbolic link when the service is enabled with systemctl enable. This makes the service a part of the specified target. WantedBy=graphical.target ensures the service is started when the system enters the graphical user environment.

  10. Question 10Beginner

    System Management · Create, modify, and delete users and groups.

    True or False: The command useradd -s /sbin/nologin -M -r john creates a system account named john that cannot be used for an interactive login and does not have a home directory created.

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    Correct answer: A

    This statement is true. The useradd command options break down as follows: -s /sbin/nologin sets the user's shell to a non-interactive shell, preventing login. -M instructs the command not to create a home directory. -r creates a system account, which typically has a UID in a lower range and is used for running services.

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