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| Certification Vendor: | CompTIA |
|---|---|
| Exam Name: | CompTIA Linux+ Certification Exam (XK0-006) |
| Exam Number: | XK0-006 |
| Exam Format: | Performance-based questions (PBQs), Multiple-choice questions |
| Certificate Validity Period: | 3 years |
| Real Exam Qty: | Maximum 90 |
| Exam Duration: | 90 minutes |
| Exam Price: | Approximately USD 358 (varies by region) |
| Related Certifications: | CompTIA A+ CompTIA Network+ CompTIA Security+ |
| Available Languages: | English |
| Passing Score: | 720 (on a scale of 100–900) |
| Recommended Training: | CompTIA CertMaster Learn (Linux+ XK0-006) CompTIA Official Training Resources |
| Exam Registration: | Pearson VUE Exam Registration CompTIA Linux+ Official Certification Page |
| Sample Questions: | CompTIA XK0-006 Sample Questions |
| Exam Way: | Online (proctored) or onsite testing via Pearson VUE centers |
| Pre Condition: | No mandatory prerequisites, but 12–24 months of Linux administration experience or CompTIA A+ / Network+ knowledge is recommended. |
| Official Syllabus URL: | https://www.comptia.org/certifications/linux |
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NEW QUESTION # 35
Users cannot access an application that is running inside containers. The administrator wants to validate whether the containers are running. Which of the following commands should the administrator use?
Answer: C
Explanation:
The docker ps command lists all running containers, allowing the administrator to verify whether the application's containers are active.
NEW QUESTION # 36
Which of the following best describes PEP 8?
Answer: A
Explanation:
The correct answer is B. A set of coding conventions for Python code. PEP 8 stands for Python Enhancement Proposal 8, and it defines the official style guide for writing clean, readable, and consistent Python code. In Linux system administration, particularly within automation and scripting tasks, Python is widely used, and adhering to PEP 8 ensures that scripts are maintainable and understandable by other administrators.
PEP 8 covers a broad range of coding standards, including naming conventions, indentation, spacing, line length, import organization, and general code layout. For example, it recommends using four spaces per indentation level, limiting lines to 79 characters, and using descriptive variable and function names. These guidelines help improve code readability and reduce errors when scripts are shared or maintained across teams.
Option A is incorrect because PEP 8 does not list built-in Python modules; instead, it focuses on how code should be written. Option C is incorrect because PEP 8 is not a name for standard Python libraries but rather a style guide applicable to all Python code. Option D is incorrect because PEP 8 is not a data structure; it is purely a documentation standard.
From a Linux+ perspective, understanding PEP 8 is important in the context of scripting and automation.
Administrators frequently write Python scripts to automate system tasks such as log analysis, configuration management, and monitoring. Following PEP 8 ensures consistency across scripts, making collaboration easier and reducing troubleshooting time. Properly formatted code also improves long-term maintainability, which is critical in production environments where scripts may be reused or modified over time.
NEW QUESTION # 37
An administrator set up a new user account called "test". However, the user is unable to change their password. Given the following output:
Which of the following is the most likely cause of this issue?
Answer: C
Explanation:
For normal users to change their own password, /bin/passwd must have the SUID bit set (permissions should be -rwsr-xr-x). The SUID bit allows users to run the program with the permissions of the file owner (root), which is required to update /etc/shadow. The provided output shows /bin/passwd does not have the SUID bit (no 's' in the owner's execute field). As a result, user "test" receives an "Authentication token manipulation error". The password can be changed as root, which confirms it's a permissions/SUID issue.
Other options:
* B. If the password didn't meet requirements, a different error would appear.
* C. There is no minimum day limit preventing password change (see chage -l output).
* D. The account and password are active (not disabled).
Reference:
CompTIA Linux+ Study Guide: Exam XK0-006, Sybex, Chapter 6: "User and Group Management", Section:
"Managing User Passwords and Policies"
CompTIA Linux+ XK0-006 Objectives, Domain 1.0: System Management
NEW QUESTION # 38
A systems administrator is having issues with a third-party API endpoint. The administrator receives the following output:
Which of the following actions should the administrator take to resolve the issue?
Answer: B
Explanation:
This scenario represents a name resolution failure, which is a common troubleshooting case addressed in CompTIA Linux+ V8. The critical clues are the error messages returned by both curl and dig.
The curl error "Could not resolve host" indicates that the system is unable to translate the hostname into an IP address. This is confirmed by the dig output, which returns NXDOMAIN, meaning the DNS resolver cannot resolve the requested domain name. Importantly, the dig output shows that the query is reaching a DNS server (10.255.255.254), but the resolution fails, strongly pointing to a DNS client configuration issue.
Option C, reviewing and fixing the DNS client configuration file (such as /etc/resolv.conf or systemd-resolved settings), is the correct action. Linux+ V8 documentation highlights DNS misconfiguration as a primary cause of application connectivity issues. Incorrect nameserver entries, unreachable DNS servers, or misconfigured resolvers commonly produce NXDOMAIN responses.
The other options are incorrect. Firewall issues would result in connection timeouts, not DNS resolution failures. Requesting a new API endpoint is unnecessary without first confirming local DNS functionality.
Internet connectivity issues would typically prevent any DNS communication, but here a DNS server is clearly being contacted.
Linux+ V8 stresses a layered troubleshooting approach: verify DNS resolution before investigating network ports or application logic. Therefore, the correct answer is C. Review and fix the DNS client configuration file.
NEW QUESTION # 39
Which of the following is the first step when starting a new Python project on a Linux system?
Answer: B
Explanation:
The correct answer is A. python -m venv /path/to/project because creating a virtual environment is the recommended first step when starting a new Python project. A virtual environment isolates project dependencies from the system-wide Python installation, ensuring that libraries and package versions do not conflict with other projects or system components.
The command python -m venv /path/to/project creates a self-contained directory that includes its own Python interpreter, libraries, and scripts. This allows developers and administrators to install packages specific to the project without affecting the global environment. After creating the virtual environment, the next steps typically include activating it (e.g., source /path/to/project/bin/activate) and then installing dependencies using pip.
Option B (python -m pip install -r /path/to/project) is incorrect because installing dependencies from a requirements file assumes that a virtual environment or project structure is already in place. It is not the first step.
Option C (export PYTHON_PATH=/path/to/project) is incorrect because setting PYTHONPATH only modifies where Python looks for modules. It does not create an isolated environment or manage dependencies.
Option D (python -m source /path/to/project) is incorrect because source is a shell built-in command used to activate environments, not a Python module, and this syntax is invalid.
From a Linux+ perspective, using virtual environments aligns with best practices in automation and scripting.
It ensures consistency, reproducibility, and isolation of development environments, which is critical for deployment, testing, and maintaining Python-based applications.
NEW QUESTION # 40
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