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CompTIA XK0-006 Exam Syllabus Topics:

TopicDetails
Topic 1
  • Automation, Orchestration, and Scripting: Covers task automation with tools like Ansible, shell and Python scripting, Git version control, and responsible AI-assisted development.
Topic 2
  • Troubleshooting: Addresses diagnosing and resolving issues across system health, hardware, storage, networking, security configurations, and performance optimization.
Topic 3
  • Security: Focuses on securing Linux systems through authentication, firewalls, OS hardening, account policies, cryptography, and compliance checks.
Topic 4
  • Services and User Management: Covers day-to-day Linux administration including file management, user accounts, processes, software, services, and container operations.

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CompTIA Linux+ Certification Exam Sample Questions (Q139-Q144):

NEW QUESTION # 139
A systems administrator is creating a now shared directory. Which of the following commands ensures all users from the same group will be able to work with the newly created files?

Answer: B

Explanation:
Setting the setgid bit on a shared directory causes newly created files and subdirectories to inherit the directory's group ownership, allowing members of the same group to collaborate consistently on new files.


NEW QUESTION # 140
Which of the following commands should an administrator run to check for errors during startup?

Answer: C

Explanation:
The dmesg command displays kernel ring buffer messages, including hardware detection, driver loading, and startup-related errors that occur during boot.


NEW QUESTION # 141
A Linux administrator receives reports about MySQL service availability issues. The administrator observes the following information:

Which of the following explains why the server was offline?

Answer: A

Explanation:
The logs show mysqld invoked oom-killer, which is the Linux Out-Of-Memory (OOM) killer. This indicates MySQL consumed too much memory, forcing the kernel to terminate it to protect the system, which caused the service outage.


NEW QUESTION # 142
An
administrator is investigating the reason a Linux workstation is not resolving the website http://www.comptia.
org. The administrator executes some commands and receives the following output:

Which of the following is the most likely cause?

Answer: B

Explanation:
When troubleshooting name resolution issues in Linux, /etc/hosts entries take precedence over DNS lookups.
The workstation's /etc/hosts file contains the line:
CopyEdit
104.18.99.101 www.comptia.org
This means any attempt to access www.comptia.org will resolve to 104.18.99.101, regardless of the real DNS response. However, both dig and nslookup show the correct IP as 104.18.16.29. Because the local /etc/hosts entry overrides DNS, and the hardcoded IP is either incorrect or unreachable, all network traffic to www.
comptia.org will fail or not reach the intended destination, resulting in the observed connectivity issue (Destination Host Unreachable).
Other options:
* B. The lack of IPv6 support is irrelevant since the host is using IPv4 and the DNS queries for IPv4 (A record) are successful.
* C. The firewall would block all HTTP/HTTPS connections, but the error shown is a host unreachable, not a port-specific issue.
* D. The nameserver is working; both dig and nslookup queries succeed and return the correct A record.
Reference:
CompTIA Linux+ Study Guide: Exam XK0-006, Sybex, Chapter 8: "Networking Fundamentals", Section:
"Troubleshooting Name Resolution"
CompTIA Linux+ XK0-006 Objectives, Domain 2.0: Networking


NEW QUESTION # 143
Application owners are reporting that their application stops responding after several days of running, and they need to restart it. A Linux administrator obtains the following details from the dmesgcommand:

The application owners mentioned that resources to the system have boon increased, and the error takes longer to appear. Which of the following best describes the reason the process is being terminated by OOM?

Answer: C

Explanation:
The OOM killer is terminating the application after it runs for several days, and adding system resources only delays the failure. That behavior indicates the application is gradually consuming more memory over time, which is consistent with a memory leak.


NEW QUESTION # 144
......

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