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NEW QUESTION # 126
A Linux systems administrator is running an important maintenance task that consumes a large amount of CPU, causing other applications to slow. Which of the following actions should the administrator take to help alleviate the issue?
Answer: B
Explanation:
The renice command adjusts the priority of a running process. By lowering the maintenance task's priority, the scheduler allocates more CPU time to other applications, reducing their slowdown.
NEW QUESTION # 127
A systems administrator is reconfiguring existing user accounts in a Linux system. Which of the following commands should the administrator use to include "myuser" in the finance group?
Answer: A
Explanation:
To add an existing user (myuser) to an existing group (finance) without removing them from other groups, the correct command is usermod -aG finance myuser. The -aG option appends the user to the supplementary group(s) specified.
NEW QUESTION # 128
A DevOps engineer needs to create a local Git repository. Which of the following commands should the engineer use?
Answer: C
Explanation:
The correct answer is A. git init because it is the command used to initialize a new local Git repository in a directory. When executed, git init creates a hidden .git directory that contains all the necessary metadata and configuration files required for version control. This action effectively turns the current directory into a Git repository, allowing the user to begin tracking changes.
In a DevOps and automation context, initializing repositories is a foundational task. It enables version control for scripts, configuration files, and infrastructure-as-code, which are critical components in modern Linux environments. Once the repository is initialized, the engineer can proceed with adding files (git add) and committing changes (git commit).
Option B (git clone) is incorrect because it is used to copy an existing remote repository to a local system. It does not create a new repository from scratch but instead duplicates an already initialized one.
Option C (git config) is incorrect because it is used to configure Git settings such as username, email, and preferences. It does not initialize a repository.
Option D (git add) is incorrect because it stages changes for commit within an already initialized repository. It cannot be used before a repository is created.
From a Linux+ perspective, understanding Git operations is essential under automation and orchestration topics. Tools like Git support collaboration, change tracking, and deployment workflows. The git init command represents the starting point for managing code and configuration in a controlled and versioned manner, making it a critical skill for system administrators and DevOps engineers.
NEW QUESTION # 129
Which of the following commands should an administrator use to see a full hardware inventory of a Linux system?
Answer: D
Explanation:
dmidecode retrieves detailed hardware information from the system's DMI/SMBIOS, including BIOS, CPU, memory, and motherboard details, providing a full hardware inventory.
NEW QUESTION # 130
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: B
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 # 131
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