COMPTIA XK0-005 VALID EXAM BLUEPRINT | RELIABLE XK0-005 TEST PREP

CompTIA XK0-005 Valid Exam Blueprint | Reliable XK0-005 Test Prep

CompTIA XK0-005 Valid Exam Blueprint | Reliable XK0-005 Test Prep

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The CompTIA Linux+ Certification Exam (XK0-005) is one of the popular exams of CompTIA XK0-005. It is designed for CompTIA aspirants who want to earn the CompTIA Linux+ Certification Exam (XK0-005) certification and validate their skills. The XK0-005 test is not an easy exam to crack. It requires dedication and a lot of hard work. You need to prepare well to clear the CompTIA Linux+ Certification Exam (XK0-005) test on the first attempt. One of the best ways to prepare successfully for the XK0-005 examination in a short time is using real XK0-005 Exam Dumps.

CompTIA Linux+ certification is an excellent way for IT professionals to demonstrate their expertise in Linux administration, security, and troubleshooting, and to enhance their career prospects. With the growing demand for Linux-based systems in various industries, the CompTIA Linux+ certification is becoming increasingly valuable for IT professionals who want to specialize in this area.

CompTIA Linux+ certification is a valuable credential for IT professionals who work with Linux-based systems. It demonstrates their proficiency in managing Linux systems, such as installing and configuring software, managing users and groups, managing file systems and storage, and securing Linux systems. CompTIA Linux+ Certification Exam certification is also recognized by major IT companies, such as Dell, HP, IBM, and Lenovo. The XK0-005 Certification Exam is designed to test the candidate's knowledge and skills in Linux administration, from basic to advanced levels. It is suitable for IT professionals who are new to Linux, as well as those who have some experience with Linux and want to validate their skills.

CompTIA Linux+ Certification Exam Sample Questions (Q351-Q356):

NEW QUESTION # 351
A systems administrator needs to know the mail exchange (MX) record for the foo.com domain. Which of the following commands will accomplish this task?

  • A. host mx foo.com
  • B. nslookup mx foo.com
  • C. dig mx foo.com
  • D. telnet mx foo.com

Answer: C

Explanation:
The dig command is used for querying DNS information. To retrieve the MX records for a domain (which indicate where emails should be routed), the command dig mx foo.com is used. This returns the mail servers associated with the domain, including their priority levels.


NEW QUESTION # 352
A systems administrator wants to permit access temporarily to an application running on port 1234/TCP on a Linux server. Which of the following commands will permit this traffic?

  • A. firewall-cmd -add-port=1234/tcp
  • B. firewall-cmd -service=1234 -protocol=tcp
  • C. firewall-cmd -add-whitelist-uid=1234
  • D. firewall-cmd -new-service=1234/tcp

Answer: A

Explanation:
The firewall-cmd command is used to manage firewalld, which is a firewall service for Linux systems that provides dynamic and persistent configuration of firewall rules. Firewalld uses zones and services to define different levels of trust and access for network connections.
To permit access temporarily to an application running on port 1234/TCP on a Linux server, the systems administrator can use the firewall-cmd --add-port=1234/tcp command. This command will add a rule to the default zone (usually public) that allows incoming traffic on port 1234/TCP. The rule will only be effective until the next reload or restart of firewalld. To make the rule permanent, the administrator can add the --permanent option to the command. The statement C is correct.
The statements A, B, and D are incorrect because they do not permit access to port 1234/TCP. The firewall-cmd --new-service=1234/tcp command does not exist. The firewall-cmd --service=1234 --protocol=tcp command does not work because 1234 is not a predefined service name in firewalld. The firewall-cmd --add-whitelist-uid=1234 command does not exist. Reference: [How to Use FirewallD to Manage Firewall in Linux]


NEW QUESTION # 353
The application team has reported latency issues that are causing the application to crash on the Linux server.
The Linux administrator starts
troubleshooting and receives the following output:

Which of the following commands will improve the latency issue?

  • A. # systemctl stop network
    # ethtool -g eth0 512
    # systemctl start network
  • B. # ifdown eth0
    # ip link set dev eth0 mtu 800
    # ifup eth0
  • C. # echo 'net.core.rmem max = 12500000' >> /etc/sysctl.conf
    # echo 'net.core.wmem_max = 12500000' >> /etc/sysctl.conf
    # sysctl -p
  • D. # echo 'net.core.net_backlog = 5000000' >> /etc/sysctl.conf
    # sysctl -p
    # systemctl daemon-reload

Answer: C

Explanation:
Explanation
The best command to use to improve the latency issue is D. # echo 'net.core.rmem max = 12500000' >>
/etc/sysctl.conf # echo 'net.core.wmem_max = 12500000' >> /etc/sysctl.conf # sysctl -p. This command will increase the size of the receive and send buffers for the network interface, which can improve the network performance and reduce packet loss. The sysctl command will apply the changes to the kernel parameters without rebooting the system.
The other commands are either incorrect or not suitable for this task. For example:
A: # echo 'net.core.net_backlog = 5000000' >> /etc/sysctl.conf # sysctl -p # systemctl daemon-reload will try to increase the backlog queue for incoming connections, but this is not relevant for the latency issue. The systemctl daemon-reload command is also unnecessary, as it only reloads the systemd configuration files, not the kernel parameters.
B: # ifdown eth0 # ip link set dev eth0 mtu 800 # ifup eth0 will try to change the maximum transmission unit (MTU) of the network interface to 800 bytes, but this is too low and may cause fragmentation and performance degradation. The default MTU for Ethernet is 1500 bytes, and it should not be changed unless there is a specific reason.
C: # systemctl stop network # ethtool -g eth0 512 # systemctl start network will try to change the ring buffer size of the network interface to 512, but this is too small and may cause packet drops and latency spikes. The default ring buffer size for Ethernet is usually 4096 or higher, and it should be increased if there is a high network traffic.


NEW QUESTION # 354
A Linux administrator needs to analyze a failing application that is running inside a container. Which of the following commands allows the Linux administrator to enter the running container and analyze the logs that are stored inside?

  • A. podman exec -ti app /bin/sh
  • B. docker exec -d app /bin/bash
  • C. docker run -ti app /bin/sh
  • D. podman run -d app /bin/bash

Answer: A

Explanation:
Podman exec -ti app /bin/sh allows the Linux administrator to enter the running container and analyze the logs that are stored inside. This command uses the podman tool, which is a daemonless container engine that can run and manage containers on Linux systems. The exec option executes a command inside an existing container, in this case app, which is the name of the container that runs the failing application. The -ti option allocates a pseudo-TTY and keeps STDIN open, allowing for interactive shell access to the container. The /bin
/sh argument specifies the shell command to run inside the container, which can be used to view and manipulate the log files.
The other options are not correct commands for entering a running container and analyzing the logs. Docker run -ti app /bin/sh creates a new container from the app image and runs the /bin/sh command inside it, but does not enter the existing container that runs the failing application. Podman run -d app /bin/bash also creates a new container from the app image and runs the /bin/bash command inside it, but does so in detached mode, meaning that it runs in the background without interactive shell access. Docker exec -d app /bin/bash executes the /bin/bash command inside the existing app container, but also does so in detached mode, without interactive shell access.
References: CompTIA Linux+ (XK0-005) Certification Study Guide, Chapter 18: Automating Tasks; View container logs | Docker Docs; How to see the logs of a docker container - Stack Overflow


NEW QUESTION # 355
A Linux administrator is trying to start the database service on a Linux server but is not able to run it. The administrator executes a few commands and receives the following output:

Which of the following should the administrator run to resolve this issue? (Choose two.)

  • A. journalctl -g mariadb
  • B. service mariadb reload
  • C. systemctl unmask mariadb
  • D. dnf reinstall mariadb
  • E. systemctl start mariadb
  • F. chkconfig mariadb on

Answer: C,E

Explanation:
These commands will unmask the mariadb service, which is currently prevented from starting, and then start it normally.


NEW QUESTION # 356
......

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