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CompTIA Linux+ Certification Exam Sample Questions (Q35-Q40):

NEW QUESTION # 35
Which of the following would significantly help to reduce data loss if more than one drive fails at the same time?

A. Load balancing
B. Server clustering
C. VDI
D. RAID

Answer: D

Explanation:
RAID stands for Redundant Array of Independent Disks, which is a technology that combines multiple physical disks into a logical unit that provides improved performance, reliability, or both. RAID can significantly help to reduce data loss if more than one drive fails at the same time, depending on the RAID level used. For example, RAID 1 (mirroring) duplicates the data on two or more disks, so that if one disk fails, the data can be recovered from another disk. RAID 5 (striping with parity) distributes the data and parity information across three or more disks, so that if one disk fails, the data can be reconstructed from the remaining disks. RAID 6 (striping with double parity) extends RAID 5 by adding another parity block, so that if two disks fail, the data can still be recovered from the remaining disks. References: [What is RAID?]

NEW QUESTION # 36
A systems administrator needs to check if the service systemd-resolved.service is running without any errors. Which of the following commands will show this information?

A. systemctl status systemd-resolved.service
B. systemctl mask systemd-resolved.service
C. systemctl enable systemd-resolved.service
D. systemctl show systemd-resolved.service

Answer: A

Explanation:
The command systemct1 status systemd-resolved.service will show the information about the service systemd-resolved.service. The systemct1 command is a tool for managing system services and units. The status option displays the current status of a unit, such as active, inactive, or failed. The output also shows the unit description, loaded configuration, process ID, memory usage, and recent log messages. This command will show if the service systemd- resolved.service is running without any errors.

NEW QUESTION # 37
An administrator accidentally installed the httpd RPM package along with several dependencies. Which of the following options is the best way for the administrator to revert the package installation?

A. apt-get clean
B. yum history undo last
C. dnf clean all
D. rpm -e httpd

Answer: B

Explanation:
The yum history undo last command allows the administrator to undo the most recent transaction, effectively removing the httpd package and any installed dependencies. This is the safest and easiest way to revert package installations in RPM-based systems using yum.

NEW QUESTION # 38
A Linux administrator needs to disable the Sendmail service on a Linux server and prevent it from being started manually and during boot.
Which of the following is the BEST command to do this?

A. systemctl reset-failed sendmail
B. systemctl disable sendmail
C. systemctl mask sendmail
D. systemctl stop sendmail

Answer: C

Explanation:
Mask will link the service to /dev/null making it impossible to start the service unless it is unmasked.

NEW QUESTION # 39
A systems administrator frequently connects to a remote host via SSH and a non-standard port. The systems administrator would like to avoid passing the port parameter on the command line every time. Which of the following files can be used to set a different port value for that host?

A. ~/.ssh/authorized_keys
B. ~/.ssh/config
C. /etc/ssh/sshd_config
D. /etc/ssh/moduli

Answer: B

Explanation:
The ~/.ssh/config file can be used to set various options for SSH connections, including the port number, for specific hosts or groups of hosts. This file is located in the user's home directory and affects only the current user. The /etc/ssh/sshd_config file is used to configure the SSH server daemon, not the client. The /etc/ssh
/moduli file contains parameters for Diffie-Hellman key exchange, not port settings. The ~/.ssh
/authorized_keys file contains public keys for authentication, not port settings. References: CompTIA Linux+ (XK0-005) Certification Study Guide, Chapter 12: Secure Shell (SSH), page 414.

NEW QUESTION # 40
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