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| Certification Vendor: | CompTIA |
|---|---|
| Exam Name: | CompTIA Linux+ Certification Exam |
| Exam Number: | XK0-006 |
| Exam Price: | USD 348 |
| Passing Score: | 720 (on a scale of 100–900) |
| Exam Duration: | 90 minutes |
| Available Languages: | English |
| Real Exam Qty: | Maximum of 90 |
| Related Certifications: | CompTIA Linux+ |
| Exam Format: | Performance-based, Multiple-choice |
| Certificate Validity Period: | 3 years |
| Sample Questions: | CompTIA XK0-006 Sample Questions |
| Exam Way: | Online (via Pearson VUE) or In-person at Pearson VUE testing centers |
| Pre Condition: | No formal prerequisites; recommended 12 months of hands-on experience with Linux administration |
| Official Syllabus URL: | https://www.comptia.org/en-us/certifications/linux |
>> Exam Questions XK0-006 Vce <<
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NEW QUESTION # 107
A systems administrator needs to set the IP address of a new DNS server. Which of the following files should the administrator modify to complete this task?
Answer: A
Explanation:
The /etc/resolv.conf file defines DNS resolver settings, including the IP addresses of DNS servers that the system should use for hostname resolution.
NEW QUESTION # 108
A small group of remote users needs permission to run some administrative commands on a Linux server.
Which of the following approaches is the best way to address this request?
Answer: A
Explanation:
The correct answer is D. Create a Linux group, add the users, and configure this group on /etc/sudoers to use sudo because it follows the principle of least privilege while providing controlled administrative access. In Linux systems, sudo is the recommended mechanism for delegating elevated privileges without granting full root access.
By creating a dedicated group and adding users to it, administrators can centrally manage permissions.
Configuring this group in the /etc/sudoers file (preferably using visudo) allows fine-grained control over which commands can be executed with elevated privileges. This approach ensures accountability, as sudo logs all executed commands, and enhances security by avoiding password sharing.
Option A is incorrect because the sticky bit does not grant administrative privileges; it is used primarily on directories to restrict file deletion.
Option B is partially correct in principle (least privilege), but it is incomplete because it does not specify implementation. Without integrating those rules into sudoers or another privilege delegation mechanism, it does not provide a complete solution.
Option C is incorrect and highly insecure. Enabling root login over SSH and sharing the root password violates security best practices, eliminates accountability, and significantly increases the risk of compromise.
From a Linux+ security perspective, using sudo with group-based access control is the best practice for privilege delegation. It ensures secure, auditable, and manageable administrative access, aligning with enterprise security standards and minimizing risk exposure.
NEW QUESTION # 109
Users report that a Linux system is unresponsive and simple commands take too long to complete. The Linux administrator logs in to the system and sees the following: Output 1:
10:06:29 up 235 day, 19:23, 2 users, load average: 8.71, 8.24, 7.71
Which of the following is the system experiencing?
Answer: C
Explanation:
This scenario is a classic performance troubleshooting case covered under the Troubleshooting domain of the CompTIA Linux+ V8 objectives. The key indicators to analyze are the load average values and the CPU utilization statistics.
The uptime command shows load averages of 8.71, 8.24, and 7.71 over the 1-, 5-, and 15-minute intervals.
Load average represents the average number of processes that are either running on the CPU or waiting to run. On a system with 4 CPU cores, a healthy load average would typically be close to or below 4. Load averages consistently near or above 8 indicate that there are significantly more runnable processes than available CPU resources, causing processes to wait and resulting in poor system responsiveness.
The CPU output further confirms this condition. The %idle value is 0, meaning the CPU has no idle time available. The majority of CPU time is spent in user space (65.88%) and system/kernel space (20.54%), indicating heavy computational and kernel activity. While %iowait is present at 5.65%, it is not high enough to suggest that disk I/O is the primary bottleneck.
Option C, high CPU load, best explains the symptoms. High CPU load causes commands to execute slowly because processes are competing for limited CPU time. This directly matches the observed behavior of the system being unresponsive.
The other options are incorrect. High uptime simply indicates how long the system has been running and does not cause performance issues by itself. High latency is a general term and not a specific diagnosis shown by the metrics provided. High I/O wait times would require a significantly higher %iowait value.
According to Linux+ V8 documentation, correlating load averages with CPU core count and utilization is essential for accurate performance diagnosis. Therefore, the correct answer is C. High CPU load.
NEW QUESTION # 110
A user states that an NFS share Is reporting random disconnections. The systems administrator obtains the following information
Which of the following best explains the symptoms that are being reported?
Answer: A
Explanation:
This issue is best analyzed using a layered troubleshooting approach, as recommended in the Troubleshooting domain of CompTIA Linux+ V8. The reported symptom is intermittent or random disconnections from an NFS share, which commonly indicates a network reliability issue rather than a configuration or filesystem problem.
The most critical evidence comes from the output of ip -s link show. The network interface enp1s0 is reporting significant numbers of errors and dropped packets on both the receive (RX) and transmit (TX) paths. High packet loss at the network interface level directly affects protocols like NFS, which rely on stable, continuous TCP/IP communication. When packets are dropped or corrupted, NFS clients may experience timeouts, retransmissions, and apparent disconnections.
Although the df -h output shows that the NFS filesystem is 95% full, this alone does not typically cause random disconnections. A nearly full filesystem may lead to write failures or performance degradation, but it does not explain intermittent connectivity loss. Linux+ V8 documentation notes that filesystem capacity issues usually present as I/O errors, not transport-layer disconnects.
Options A and B can also be ruled out. If the mount point or IP address were incorrect, the NFS share would fail consistently rather than intermittently. The fact that the share is mounted and accessible confirms that the mount configuration and IP addressing are correct.
Linux+ V8 emphasizes that NFS performance and reliability are highly sensitive to network quality. Packet errors, drops, faulty NICs, cabling issues, duplex mismatches, or driver problems commonly result in unstable NFS behavior.
Therefore, the best explanation for the reported random disconnections is D. The interface is reporting a high number of errors and dropped packets.
NEW QUESTION # 111
Which of the following describes PEP 8?
Answer: C
Explanation:
Python scripting is part of Linux automation, and Linux+ V8 includes knowledge of Python development standards. PEP 8 stands for Python Enhancement Proposal 8 and defines the official style guide for Python code.
PEP 8 provides conventions for code layout, indentation, naming, line length, whitespace usage, and commenting. Its purpose is to improve code readability and maintainability, especially in collaborative environments. Linux+ V8 emphasizes that standardized coding practices are critical in automation and DevOps workflows.
The other options are incorrect. Python virtual environments are managed using tools such as venv. Package installation is handled by pip. Octal values are represented using specific syntax and are unrelated to PEP 8.
Therefore, the correct answer is A.
NEW QUESTION # 112
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