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[General] Practice XK0-006 Test Online & Valid XK0-006 Test Labs

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【General】 Practice XK0-006 Test Online & Valid XK0-006 Test Labs

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CompTIA Linux+ Certification Exam Sample Questions (Q87-Q92):NEW QUESTION # 87
An administrator needs to remove the directory /home/user1/data and all of its contents. Which of the following commands should the administrator use?
  • A. rmdir -p /home/user1/data
  • B. rm -r /home/user1/data
  • C. cut -d /home/user1/data
  • D. ln -d /home/user1/data
Answer: B
Explanation:
File and directory management is a core system administration skill addressed in Linux+ V8. When an administrator needs to delete a directory that contains files or subdirectories, a recursive deletion is required.
The correct command is rm -r /home/user1/data. The rm command removes files, and the -r (recursive) option allows it to delete directories and all of their contents, including nested files and subdirectories. This is the standard and correct method for removing non-empty directories.
The other options are incorrect. rmdir -p only removes empty directories and will fail if the directory contains files. ln -d is used to create directory hard links, not remove directories. cut -d is a text-processing command unrelated to filesystem operations.
Linux+ V8 documentation stresses caution when using rm -r, as it permanently deletes data without recovery unless backups exist. Therefore, the correct answer is C.

NEW QUESTION # 88
An average of one out of three users in a company cannot reach the company website. A Linux administrator determines that one of the three website servers is down. The administrator inspects the DNS configuration for the website and notices the following entry:

Which of the following accurately explains the issue?
  • A. The administrator has incorrectly configured the DNS server to be an iterative resolver instead of an authoritative resolver.
  • B. DNS returns all three records in a different order each time, and the browser typically uses the first address in the DNS response.
  • C. The DNS configuration is missing corresponding AAAA records and PTR records, and this is causing clients to fail the hostname translation.
  • D. One of the DNS records has not been signed with a DNSSEC-supported key, and this is causing some web browsers to reject the DNS response.
Answer: B
Explanation:
With multiple A records, DNS performs simple round-robin ordering and returns the records in a different sequence on each query. Most clients try the first address returned-so when the downed server's IP appears first (about one in three times), those users cannot connect.

NEW QUESTION # 89
Which of the following commands should a Linux administrator use to determine the version of a kernel module?
  • A. depmod bluetooth
  • B. modprobe bluetooth
  • C. modinfo bluetooth
  • D. lsmod bluetooth
Answer: C
Explanation:
The modinfo command displays detailed information about a kernel module, including its version, author, description, and parameters.

NEW QUESTION # 90
Users cannot access an application that is running inside containers. The administrator wants to validate whether the containers are running. Which of the following commands should the administrator use?
  • A. docker start
  • B. docker images
  • C. docker run
  • D. docker ps
Answer: D
Explanation:
Container troubleshooting is a key competency within the Automation, Orchestration, and Scripting domain of CompTIA Linux+ V8. When users report that an application running inside containers is not accessible, one of the first validation steps is to confirm whether the containers are currently running.
The docker ps command is specifically designed to list running containers on the system. By default, it displays container IDs, image names, command executed, uptime, port mappings, and container names. This allows administrators to quickly determine whether the application container is active and whether it is exposing the expected ports. This aligns directly with Linux+ V8 guidance on container lifecycle management and operational validation.
The other options are not suitable for this purpose. docker start is used to start one or more stopped containers but does not display container status. docker run creates and starts a new container, which is not appropriate when the goal is only to check the status of existing containers. docker images lists locally available container images but provides no information about running or stopped containers.
Linux+ V8 documentation emphasizes the importance of using the correct Docker subcommands when diagnosing containerized applications. Verifying container runtime state using docker ps is a foundational troubleshooting step before investigating networking, firewall rules, or application-level errors.
Therefore, the correct command to validate whether containers are running is docker ps, making Answer B correct.

NEW QUESTION # 91
A systems administrator needs to set the IP address of a new DNS server. Which of the following files should the administrator modify to complete this task?
  • A. /etc/whois.conf
  • B. /etc/dnsmasq.conf
  • C. /etc/nsswitch.conf
  • D. /etc/resolv.conf
Answer: D
Explanation:
The /etc/resolv.conf file defines DNS resolver settings, including the IP addresses of DNS servers that the system should use for hostname resolution.

NEW QUESTION # 92
......
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