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| Certification Vendor: | CompTIA |
|---|---|
| Exam Name: | CompTIA Linux+ Certification Exam |
| Exam Number: | XK0-006 |
| Exam Format: | Performance-based questions, Multiple-choice |
| Exam Duration: | 90 minutes |
| Exam Price: | $358 USD |
| Available Languages: | English |
| Real Exam Qty: | Up to 90 |
| Certificate Validity Period: | 3 years |
| Passing Score: | 720 (scale 100–900) |
| Related Certifications: | CompTIA Network+ CompTIA Server+ CompTIA A+ |
| Recommended Training: | CompTIA Official Study Materials CompTIA CertMaster Learn |
| Exam Registration: | CompTIA Official Registration Pearson VUE Exam Scheduling |
| Sample Questions: | CompTIA XK0-006 Sample Questions |
| Exam Way: | Online proctored or onsite at Pearson VUE testing centers |
| Pre Condition: | No mandatory prerequisites; 12 months of hands-on Linux experience or CompTIA A+/Network+/Server+ recommended |
| Official Syllabus URL: | https://www.comptia.org/certifications/linux |
The CompTIA Linux+ Certification Exam is ideal whether you're just beginning your career in open source or planning to advance your career. Moreover, the CompTIA Linux+ Certification Exam also serves as a great stepping stone to earning advanced CompTIA Linux+ Certification Exam. Success in the XK0-006 exam is the basic requirement to get the a good job. You get multiple career benefits after cracking the CompTIA Linux+ Certification Exam. These benefits include skills approval, high-paying jobs, and promotions. Read on to find more important details about the CompTIA XK0-006 Exam Questions.
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NEW QUESTION # 45
A systems administrator is working on an SFTP server configuration. Which of the following commands will best enable the connectivity to that service from the 10.10.0.0/24 network?
Answer: B
Explanation:
The command sudo ufw allow from 10.10.0.0/24to any port 22 explicitly opens TCP port 22 (used by SFTP/SSH) only for hosts in the 10.10.0.0/24 network.
NEW QUESTION # 46
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-killer
mysqld cpuset=/ mems_allowed=0
Which of the following explains why the server was offline?
Answer: B
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 # 47
Which of the following best describes PEP 8?
Answer: B
Explanation:
PEP 8 defines the official style guide for Python, providing coding conventions that improve code readability and consistency across Python projects.
NEW QUESTION # 48
A newly hired Linux administrator needs to grant access to the Linux servers by generating a password-protected RSA key of 4096 bytes. Which of the following commands will accomplish this task?
Answer: C
Explanation:
The ssh-keygencommand is used to generate SSH key pairs. To generate an RSA key with a length of 4096 bits, the correct syntax is:
1.-t rsa: Specifies the type of key to generate, which is RSA.
2.-b 4096: Specifies the number of bits for the key, in this case 4096.
By running this command, the user will be prompted to enter a passphrase to password-protect the key, which satisfies the requirement for generating a password-protected RSA key of 4096 bits.
NEW QUESTION # 49
An administrator needs to remove the directory /home/user1/dataand all of its contents.
Which of the following commands should the administrator use?
Answer: B
Explanation:
The rm -r command recursively removes a directory and all of its contents (files and subdirectories), which is required for deleting /home/user1/data.
NEW QUESTION # 50
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