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XK0-006–100% Free New Braindumps Ebook | Excellent CompTIA Linux+ Certification

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XK0-006–100% Free New Braindumps Ebook | Excellent CompTIA Linux+ Certification

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CompTIA Linux+ Certification Exam Sample Questions (Q22-Q27):NEW QUESTION # 22
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/nsswitch.conf
  • B. /etc/resolv.conf
  • C. /etc/dnsmasq.conf
  • D. /etc/whois.conf
Answer: B
Explanation:
DNS client configuration is a foundational Linux networking task covered in Linux+ V8 system management objectives. When an administrator needs to specify the IP address of a DNS server that the system should use for name resolution, the correct file to modify is /etc/resolv.conf.
The /etc/resolv.conf file defines DNS resolver settings, including one or more nameserver entries that specify the IP addresses of DNS servers. Applications and system services rely on this file to resolve hostnames to IP addresses.
The other options are incorrect. /etc/whois.conf configures WHOIS queries. /etc/nsswitch.conf controls the order of name resolution sources but does not define DNS server IP addresses. /etc/dnsmasq.conf configures a local DNS caching service, not the system-wide resolver directly.
Linux+ V8 documentation highlights /etc/resolv.conf as the authoritative DNS client configuration file, though it may be dynamically managed by tools such as NetworkManager or systemd-resolved.
Therefore, the correct answer is B. /etc/resolv.conf.

NEW QUESTION # 23
Which of the following commands should an administrator use to see a full hardware inventory of a Linux system?
  • A. dmidecode
  • B. lscpu
  • C. lsmod
  • D. dmesg
Answer: A
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 # 24
A DevOps engineer made some changes to files in a local repository. The engineer realizes that the changes broke the application and the changes need to be reverted back. Which of the following commands is the best way to accomplish this task?
  • A. git stash
  • B. git pull
  • C. git rebase
  • D. git reset
Answer: D
Explanation:
Version control rollback operations are a core DevOps skill covered in the Linux+ V8 objectives. When changes in a local Git repository break an application and must be reverted, the administrator must choose a command that directly undoes those changes.
The command git reset is the most appropriate option in this scenario. It allows the engineer to move the current branch pointer (HEAD) to a previous commit, effectively discarding or undoing local changes.
Depending on the reset mode (--soft, --mixed, or --hard), the engineer can control whether changes are preserved in the staging area or working directory. This flexibility makes git reset the primary tool for reverting problematic local changes.
The other options are not suitable. git pull fetches and merges changes from a remote repository and does not revert local modifications. git rebase rewrites commit history and is used to reapply commits on top of another base, not to undo broken changes. git stash temporarily saves uncommitted changes for later use but does not revert the repository to a stable state.
Linux+ V8 documentation emphasizes that git reset is commonly used during local development when changes need to be undone quickly before being shared with others. Therefore, the correct answer is B.

NEW QUESTION # 25
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 ps
  • B. docker run
  • C. docker images
  • D. docker start
Answer: A
Explanation:
The docker ps command lists all running containers, allowing the administrator to verify whether the application's containers are active.

NEW QUESTION # 26
Which of the following is a characteristic of Python 3?
  • A. It is closed source.
  • B. It is extensible through modules.
  • C. It is fully backwards compatible.
  • D. It is binary compatible with Java.
Answer: B
Explanation:
Python 3 is open source and supports extensibility through modules and packages, allowing developers to add functionality easily. It is not fully backward compatible with Python 2 and has no binary compatibility with Java.

NEW QUESTION # 27
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