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| Certification Vendor: | CompTIA |
|---|---|
| Exam Name: | CompTIA Linux+ Certification Exam |
| Exam Number: | XK0-006 |
| Exam Price: | USD 348 |
| Certificate Validity Period: | 3 years |
| Available Languages: | English |
| Exam Format: | Performance-based, Multiple-choice |
| Exam Duration: | 90 minutes |
| Passing Score: | 720 (on a scale of 100โ900) |
| Real Exam Qty: | Maximum of 90 |
| Related Certifications: | CompTIA Linux+ |
| 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 |
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NEW QUESTION # 34
A Linux administrator receives reports that an application hosted in a system is not completing tasks in the allocated time. The administrator connects to the system and obtains the following details:
Which of the following actions can the administrator take to help speed up the jobs?
Answer: D
Explanation:
This scenario represents a classic CPU-bound performance issue, which is covered under the Troubleshooting domain of CompTIA Linux+ V8. The most important indicator is the load average compared to the number of available CPU cores.
The system has 4 CPU cores, as shown by nproc, but the load averages are consistently above 5, with a peak of 7.75. Load average reflects the number of processes either actively running on the CPU or waiting for CPU time. When the load average exceeds the number of CPU cores for extended periods, it indicates CPU contention. Processes must wait longer to be scheduled, resulting in delayed task completion.
The memory statistics confirm that memory is not the bottleneck. free -h shows over 3.5 GiB of available memory, and swap usage is minimal. Additionally, vmstat shows no significant swap-in or swap-out activity and low I/O wait, ruling out memory pressure and disk bottlenecks.
Increasing swap space would not help because the system is not memory constrained. Adding more disks would not address CPU scheduling delays. Increasing free memory is unnecessary because sufficient memory is already available.
Linux+ V8 documentation emphasizes correlating load average with CPU core count to diagnose CPU saturation. The most effective way to speed up job execution in this case is to increase CPU resources, such as adding more vCPUs, moving the workload to a more powerful system, or distributing the workload across multiple systems.
Therefore, the correct answer is B. Increase the amount of CPU resources available to the system.
NEW QUESTION # 35
A systems administrator needs to integrate a new storage array into the company ' s existing storage pool. The administrator wants to ensure that the server is able to detect the new storage array. Which of the following commands should the administrator use to ensure that the new storage array is presented to the systems?
Answer: B
Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
The lsscsi command is used to list information about SCSI devices (including storage arrays) that are attached to the system. This is critical when integrating a new storage array because it allows the administrator to verify that the operating system detects the new device at the SCSI layer, which is the underlying interface for most enterprise storage solutions. lsscsi outputs a list of recognized SCSI devices, their device nodes, and associated information.
Other options:
B). lsusb: Lists USB devices, not storage arrays on SCSI/SATA/SAS.
C). lsipc: Displays information on IPC (inter-process communication) facilities, unrelated to hardware detection.
D). lshw: Lists hardware details and can show storage, but lsscsi is specifically designed for SCSI device detection and is the most direct method for this task.
Reference:
CompTIA Linux+ Study Guide: Exam XK0-006, Sybex, Chapter 7: " Managing Storage " , Section: " Identifying and Accessing Storage Devices " CompTIA Linux+ XK0-006 Objectives: Domain 4.0 - Storage and Filesystems
NEW QUESTION # 36
A Linux administrator prepares a backup script named testBack.sh. The backup script must be executed at 3:00 p.m. every Sunday. Which of the following crontabconfigurations will satisfy this requirement?
Answer: C
Explanation:
This cron entry schedules the script to run at minute zero of hour fifteen every Sunday, which corresponds to 3:00 p.m. each week.
NEW QUESTION # 37
A Linux administrator needs to compare two files and provide the output in the following format:
2,3d1
< Line 2
< Line 3
4a3
Line 5
Which of the following commands should the administrator use to perform the task?
Answer: B
Explanation:
The correct answer is D. diff because the output format shown in the question is the standard output generated by the diff command in Linux. The diff utility is specifically designed to compare two files line by line and display the differences between them in a structured format. The notation such as 2,3d1 and 4a3 represents changes required to transform one file into another.
In this format, d indicates deletion, a indicates addition, and the numbers refer to line positions in each file.
For example, 2,3d1 means lines 2 through 3 in the first file should be deleted to match the second file. The < symbol shows lines present in the first file, while the > symbol shows lines from the second file. This structured comparison output is essential for troubleshooting differences between configuration files, scripts, or logs.
Option A (comm) is incorrect because comm compares two sorted files and produces three-column output indicating unique and common lines, but it does not produce the detailed edit-style output shown in the question. Option B (awk) is incorrect because awk is a powerful text-processing tool used for pattern scanning and processing, not for direct file comparison in this format. Option C (file) is incorrect because it identifies the type of a file rather than comparing file contents.
Within Linux+ objectives, using diff is a fundamental troubleshooting skill, especially when identifying configuration drift, verifying file integrity, or analyzing differences between system states. It is commonly used by administrators to quickly pinpoint discrepancies and resolve issues efficiently.
NEW QUESTION # 38
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: D
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.
NEW QUESTION # 39
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