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Free PDF Quiz 2026 Efficient CompTIA XK0-005: CompTIA Linux+ Certification Exam

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Free PDF Quiz 2026 Efficient CompTIA XK0-005: CompTIA Linux+ Certification Exam

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Earning the CompTIA Linux+ certification demonstrates to employers that the candidate has the necessary skills to work with Linux-based systems in a professional environment. CompTIA Linux+ Certification Exam certification can lead to job opportunities in various fields, including cloud computing, cybersecurity, and software development. Furthermore, the CompTIA Linux+ certification is a stepping stone to advanced Linux certifications, such as the Red Hat Certified System Administrator (RHCSA) and the Red Hat Certified Engineer (RHCE).
CompTIA Linux+ Certification Exam Sample Questions (Q840-Q845):NEW QUESTION # 840
A network administrator issues the dig www.comptia.org command and receives an NXDOMAIN response.
Which of the following files should the administrator check first?
  • A. /etc/sysconfig/network-scripts
  • B. /etc/hosts
  • C. /etc/resolv.conf
  • D. /etc/nsswitch.conf
Answer: C
Explanation:
Step-by-Step Comprehensive Detailed Explanation:
* Command Explanation:
* The dig command queries DNS servers. If NXDOMAIN is received, the system cannot resolve the domain. The /etc/resolv.conf file contains the DNS server configuration.
* Why Other Options are Incorrect:
* B: /etc/hosts maps IP addresses to hostnames but is not queried unless configured in /etc/nsswitch.
conf.
* C: /etc/sysconfig/network-scripts contains network interface configurations, unrelated to DNS.
* D: /etc/nsswitch.conf defines the order of name resolution methods, but it does not directly resolve domain names.
* References:
* CompTIA Linux+ Study Guide: Network Configuration
* man dig

NEW QUESTION # 841
A systems administrator is investigating why one of the servers has stopped connecting to the internet.

Which of the following is causing the issue?
  • A. The search entry in the /etc/resolv.conf file is incorrect.
  • B. Wired connection 1 is offline.
  • C. No default route is defined.
  • D. The DNS address has been commented out in the configuration file.
Answer: D

NEW QUESTION # 842
A Linux administrator is troubleshooting an issue in which an application service failed to start on a Linux server. The administrator runs a few commands and gets the following outputs:

Based on the above outputs, which of the following is the MOST likely action the administrator should take to resolve this issue?
  • A. Enable the logsearch.service and restart the service.
  • B. Update the KillSignal configuration for the logsearch.service to use TERM.
  • C. Update the OnCalendar configuration to schedule the start of the logsearch.service.
  • D. Increase the TimeoutStartUSec configuration for the logsearch.sevice.
Answer: D
Explanation:
The administrator should increase the TimeoutStartUSec configuration for the logsearch.service to resolve the issue. The output of systemctl status logsearch.service shows that the service failed to start due to a timeout. The output of cat /etc/systemd/system/logsearch.service shows that the service has a TimeoutStartUSec configuration of 10 seconds, which might be too short for the service to start. The administrator should increase this value to a higher number, such as 30 seconds or 1 minute, and then restart the service. The other options are incorrect because they are not related to the issue. The service is already enabled, as shown by the output of systemctl is-enabled logsearch.service. The service does not use an OnCalendar configuration, as it is not a timer unit. The service does not use a KillSignal configuration, as it is not being killed by a signal. Reference: CompTIA Linux+ (XK0-005) Certification Study Guide, Chapter 14: Managing Processes and Scheduling Tasks, pages 434-435.

NEW QUESTION # 843
While troubleshooting server issues, a Linux systems administrator obtains the following output:

Which of the following best describes the state of the system?
  • A. The system has enough free memory space
  • B. The system has consumed the system memory and swap space
  • C. The system has allocated enough buffer space
  • D. The system has swap disabled
Answer: B
Explanation:
The output shows that the system is running low on available memory and has heavily utilized swap space (1824 MB out of 2047 MB). This indicates that both RAM and swap are being exhausted, which can lead to performance degradation. The system is likely experiencing memory pressure and may require additional RAM or optimizations to reduce memory consumption.

NEW QUESTION # 844
A Linux administrator is reviewing changes to a configuration file that includes the following section:

The Linux administrator is trying to select the appropriate syntax formatter to correct any issues with the configuration file. Which of the following should the syntax formatter support to meet this goal?
  • A. YAML
  • B. JSON
  • C. Markdown
  • D. XML
Answer: A
Explanation:
The configuration file shown in the image is written in YAML format, so the syntax formatter should support YAML to correct any issues with the file. YAML stands for YAML Ain't Markup Language, and it is a human-readable data serialization language that uses indentation and colons to define key-value pairs. YAML supports various data types, such as scalars, sequences, mappings, anchors, aliases, and tags. The configuration file follows the rules and syntax of YAML, while the other options do not. Markdown is a lightweight markup language that uses plain text formatting to create rich text documents. XML is a markup language that uses tags to enclose elements and attributes. JSON is a data interchange format that uses curly braces to enclose objects and square brackets to enclose arrays. References: CompTIA Linux+ (XK0-005) Certification Study Guide, Chapter 21: Automating Tasks with Ansible, page 591.

NEW QUESTION # 845
......
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