CompTIA XK0-006 Online Practice Questions and Exam Preparation

CompTIA XK0-006 Online Questions & Answers

• Question 11:

  A DevOps engineer needs to create a local Git repository.

  Which of the following commands should the engineer use?

  A. git init
  B. git clone
  C. git config
  D. git add
  A. git init

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  Explanation

  Version control is a core DevOps practice, and CompTIA Linux+ V8 includes Git fundamentals as part of automation and orchestration objectives. To create a new local Git repository, the correct command is git init .

  The git init command initializes a new Git repository in the current directory by creating a hidden .git directory. This directory contains all the metadata required for version control, including commit history, branches, configuration settings, and object storage. After running git init, the directory becomes a fully functional local repository ready to track files and commits.

  The other options do not create a new repository. git clone is used to copy an existing remote repository to a local system, not to create a new one. git config is used to set Git configuration values such as username, email, or default editor. git add stages files for commit but only works after a repository has already been initialized.

  Linux+ V8 documentation highlights git init as the foundational command for starting version control in new projects. This command is frequently used in DevOps workflows when creating infrastructure-as-code repositories, automation scripts, or application source trees from scratch.

  By initializing a local repository, engineers can begin tracking changes, collaborating with others, and integrating Git into CI/CD pipelines.

• Question 12:

  An administrator is investigating an issue on a Linux-based router where packets enter the machine but are not sent to their destinations in the 10.0.6.0/24 subnet. The administrator inspects the following output from the diagnostic commands:

  

  Which of the following commands should the administrator run to enable the routing?

  A. ip route add 10.0.6.0/24 via 10.0.6.1
  B. iptables -P FORWARD ACCEPT
  C. systemctl enable --now firewalld
  D. systemctl restart network
  B. iptables -P FORWARD ACCEPT

• Question 13:

  A user sends a request to access a virtual server via SSH.

  Which of the following commands is used to open the SSH standard port?

  A. firewalld-cmd --permanent --add-port=22/tcp
  B. iptables-save | grep dport-22/tcp
  C. iptables -A INPUT -p tcp --dport sshd -j ACCEPT
  D. firewalld-cmd --remove-service=ssh --permanent
  A. firewalld-cmd --permanent --add-port=22/tcp

• Question 14:

  Which of the following utilities supports the automation of security compliance and vulnerability management?

  A. SELinux
  B. Nmap
  C. AIDE
  D. OpenSCAP
  D. OpenSCAP

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  Explanation

  Security compliance and vulnerability management are critical components of Linux system administration, and CompTIA Linux+ V8 places strong emphasis on automated security assessment tools. OpenSCAP is specifically designed to address these requirements.

  OpenSCAP is an open-source framework that implements the Security Content Automation Protocol (SCAP) , a set of standards used for automated vulnerability scanning, configuration compliance checking, and security auditing. It allows administrators to assess Linux systems against established security baselines such as CIS benchmarks , DISA STIGs, and organizational security policies. This makes OpenSCAP the most appropriate tool for automating both compliance and vulnerability management.

  The other options serve different security-related purposes but do not fulfill the automation requirement. SELinux is a mandatory access control system that enforces security policies at runtime but does not perform compliance scanning or vulnerability assessments. Nmap is a network scanning and discovery tool used to identify open ports and services, not compliance automation. AIDE (Advanced Intrusion Detection Environment) is a file integrity monitoring tool that detects unauthorized file changes but does not evaluate overall system compliance.

  Linux+ V8 documentation highlights OpenSCAP as a tool used to automate security audits, generate compliance reports, and integrate with configuration management workflows. Its ability to standardize security checks across multiple systems makes it essential in enterprise and regulated environments.

• Question 15:

  A Linux administrator wants to verify the runtime parameters of a container's ENTRYPOINT process.

  Which of the following commands will allow the administrator to achieve this goal?

  A. docker inspect container
  B. docker ls container
  C. docker ps container
  D. docker logs container
  A. docker inspect container

• Question 16:

  A Linux administrator wants to display a list of all containers, including ones that are stopped.

  Which of the following commands should the administrator run?

  A. docker ps -a
  B. docker image list
  C. docker stats
  D. docker list -a
  A. docker ps -a

• Question 17:

  An administrator is trying to terminate a process that is not responding.

  Which of the following commands should the administrator use in order to force the termination of the process?

  A. kill PID
  B. kill -1 PID
  C. kill -9 PID
  D. kill -15 PID
  C. kill -9 PID

• Question 18:

  A systems administrator receives a report about performance issues in a Linux production system.

  Which of the following commands should the administrator use to help diagnose the performance issues?

  A. jobs
  B. renice
  C. top
  D. pkill
  C. top

• Question 19:

  A systems administrator receives the following message after running an ip link command to verify the status of a network interface named enp0s3:

  state DOWN

  Which of the following commands should the administrator use to resolve this issue?

  A. ip link set enp0s3 up
  B. ip link ifb enp0s3 up
  C. ip link add enp0s3 up
  D. ip link enp0s3 up
  A. ip link set enp0s3 up

• Question 20:

  A systems administrator needs to check the statuses of all the services on a Linux server.

  Which of the following commands accomplishes this task?

  A. systemctl is-active --services
  B. systemctl list-sockets --type=services
  C. systemctl is-enabled --services
  D. systemctl list-units --type=services
  D. systemctl list-units --type=services

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  Explanation

  Service management using systemd is a core Linux+ V8 system management objective. Administrators frequently need to view the current status of all services to determine which ones are running, stopped, failed, or inactive.

  The correct command is systemctl list-units --type=services , which displays all loaded service units along with their current state, including whether they are active, inactive, failed, or running. This provides a comprehensive, real-time view of service statuses on the system and is commonly used during troubleshooting and audits.

  Option A , systemctl is-active, is designed to check the status of a single service, not all services. Option B lists socket units, not services. Option C , systemctl is-enabled, checks whether services are enabled at boot, not whether they are currently running.

  Linux+ V8 documentation explicitly references systemctl list-units --type=service as the primary command for viewing service runtime states.