CompTIA Updated XK0-005 Exam Questions and Answers by kaia

The top command provides areal-time, dynamic viewof system performance, showing CPU, memory usage, and running processes — essential for identifying performance bottlenecks.

jobs shows background jobs in a shell session.

renice is used to change process priority but doesn’t diagnose issues.

pkill terminates processes but doesn’t monitor performance.

JSON (JavaScript Object Notation)is a lightweight, human-readable, and widely useddata-interchange formatused in APIs, config files, and infrastructure tools (like Ansible, Terraform, etc.).

It is not a programming language (A), not a virtualization/container platform (B or D).

The sshd is the Secure Shell Daemon, which is a service that allows remote login to a Linux system using the SSH protocol. The output shows that the sshd is running on port 2222, which is a non-standard port for SSH. The default port for SSH is 22, which is what the user is trying to use. Therefore, the statement B is most likely causing the issue. The statements A, C, and D are incorrect because they do not explain why the user cannot log on using port 22. References: [How to Change SSH Port in Linux]

The +t option sets the "sticky bit" on a directory, which restricts deletion or renaming of files in the directory to the file's owner or the root user. This is commonly used in shared directories like /tmp, where multiple users may have access, but only the file owner should be allowed to modify their own files. The command chmod +t /directory/ applies this permission.