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| Certification Vendor: | CompTIA |
|---|---|
| Exam Name: | CompTIA Linux+ Certification Exam (XK0-006) |
| Exam Number: | XK0-006 |
| Exam Price: | Approximately USD 358 (varies by region) |
| Passing Score: | 720 (on a scale of 100–900) |
| Certificate Validity Period: | 3 years |
| Exam Duration: | 90 minutes |
| Related Certifications: | CompTIA Security+ CompTIA A+ CompTIA Network+ |
| Exam Format: | Multiple-choice questions, Performance-based questions (PBQs) |
| Available Languages: | English |
| Real Exam Qty: | Maximum 90 |
| Recommended Training: | CompTIA CertMaster Learn (Linux+ XK0-006) CompTIA Official Training Resources |
| Exam Registration: | CompTIA Linux+ Official Certification Page Pearson VUE Exam Registration |
| 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 # 160
A Linux administrator needs to securely erase the contents of a hard disk. Which of the following commands is the best for this task?
Answer: C
Explanation:
The shred command securely erases data by overwriting the specified device or file multiple times, making recovery nearly impossible. This is the best option for securely erasing a hard disk.
NEW QUESTION # 161
Which of the following best describes a benefit of using a Python virtual environment?
Answer: D
Explanation:
A Python virtual environment isolates project dependencies, allowing different projects to use different versions of the same package without interfering with each other.
NEW QUESTION # 162
A Linux systems administrator is resolving a privileged access issue for users who are members of an admin group. Which of the following configuration files should the administrator update so the users in the admin group will have root privileged access to the Linux system?
Answer: B
Explanation:
The /etc/sudoersfile controls which users and groups can elevate privileges via sudo. By adding a line such as %admin ALL=(ALL) ALLto /etc/sudoers, members of the admin group gain root-level access.
NEW QUESTION # 163
A Linux administrator needs to create and then connect to the app-01-imagecontainer. Which of the following commands accomplishes this task?
Answer: B
Explanation:
The docker run -it command both creates a new container from the specified image and attaches to it interactively, which is exactly what the administrator needs.
NEW QUESTION # 164
A Linux administrator receives reports about MySQL service availability issues. The administrator observes the following information:
* uptime -p shows the system has been up for only 2 minutes
* journalctl shows messages indicating:mysqld invoked oom-killermysqld cpuset=/ mems_allowed=0 Which of the following explains why the server was offline?
Answer: C
Explanation:
This scenario clearly indicates a memory exhaustion condition, which falls under the Troubleshooting domain of the CompTIA Linux+ V8 objectives. The most critical clue is the log entry stating that mysqld invoked oom-killer.
The OOM (Out-Of-Memory) killer is a Linux kernel mechanism that activates when the system runs critically low on available memory and cannot satisfy memory allocation requests. When this happens, the kernel selects a process-typically one consuming a large amount of memory-and forcibly terminates it to protect overall system stability. In this case, the MySQL daemon (mysqld) was identified as the process responsible for triggering the OOM condition.
The journalctl output explicitly confirms this behavior. Linux+ V8 documentation emphasizes that when the OOM killer is invoked, it is almost always due to physical memory exhaustion or insufficient swap space, not user intervention or application bugs alone. The additional log line showing mems_allowed=0 further supports the conclusion that the process could not allocate memory from available memory nodes.
The fact that uptime -p reports only 2 minutes of uptime strongly suggests that the system was either rebooted automatically or manually following the memory exhaustion event. Systems may reboot as part of recovery procedures after severe resource exhaustion, especially in production environments.
The other options can be ruled out. There is no indication of a user-initiated kill signal, filesystem corruption, or network connectivity issues. Network outages would not generate OOM killer messages, and filesystem errors would appear as I/O or disk-related errors in the logs.
Linux+ V8 best practices recommend addressing OOM issues by increasing system memory, tuning MySQL memory parameters, configuring swap space, or adjusting OOM scoring.
Therefore, the correct explanation is A. The process exhausted server memory.
NEW QUESTION # 165
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