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Latest CompTIA XK0-005 Test Prep, New XK0-005 Practice Materials

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CompTIA Linux+ Certification Exam Sample Questions (Q259-Q264):

NEW QUESTION # 259
A systems administrator needs to reconfigure a Linux server to allow persistent IPv4 packet forwarding.
Which of the following commands is the correct way to accomplish this task?

A. echo 1 > /proc/sys/net/ipv4/ipv_forward
B. systemct1 start ipv4_forwarding
C. sysctl -w net.ipv4.ip_forward=1
D. firewall-cmd --enable ipv4_forwarding

Answer: C

Explanation:
The command sysctl -w net.ipv4.ip_forward=1 enables IPv4 packet forwarding temporarily by setting the kernel parameter net.ipv4.ip_forward to 1. To make this change persistent, the administrator needs to edit the file /etc/sysctl.conf and add the line net.ipv4.ip_forward = 1. The other options are incorrect because they either use the wrong file (/proc/sys/net/ipv4/ipv_forward), the wrong command (firewall-cmd or systemct1), or the wrong option (--enable or start). References: CompTIA Linux+ (XK0-005) Certification Study Guide, Chapter 12: Managing Network Connections, page 378.

NEW QUESTION # 260
A systems administrator receives reports that several virtual machines in a host are responding slower than expected. Upon further investigation, the administrator obtains the following output from one of the affected systems:

Which of the following best explains the reported issue?

A. The virtual machine has enough CPU cycles, leading to the system use percentage being higher than expected.
B. The virtual machine is running out of CPU resources, leading to users experiencing longer response times.
C. The physical host is running out of CPU resources, leading to insufficient CPU time being allocated to virtual machines.
D. The physical host has enough CPU cores, leading to users running more processes to compensate for the slower response times.

Answer: B

Explanation:
Based on the output from one of the affected systems, the best explanation for the reported issue is that the virtual machine is running out of CPU resources, leading to users experiencing longer response times (D). The output shows that the system use percentage is very high (57.85%), indicating that the virtual machine is using most of its CPU cycles for system processes. This leaves little CPU time for user processes, which results in slower performance. The other explanations are not supported by the output or are contradictory. References:
* [CompTIA Linux+ Study Guide], Chapter 8: Optimizing Linux Performance, Section: Monitoring CPU Usage
* [How to Interpret CPU Usage Statistics]

NEW QUESTION # 261
A Linux administrator is adding a static IP address to a network interface on a Linux system. The administrator modifies the ifcfg- eth0 configuration file with the following settings:

After the administrator restarts the Linux server, the system is not connected to the network.
Which of the following configuration settings needs to be changed?

A. Set BOOTPROTO to BOOTP and USERCTL to yes.
B. Set BOOTPROTO to NONE and ONBOOT to yes.
C. Set NETMASK to 255.255.0.0 and ONBOOT to yes.
D. Set USERCTL to yes and ONBOOT to no.

Answer: B

Explanation:
BOOTPRO is set to NONE for static assignment.
https://www.dummies.com/programming/networking/network-administration-linux-ifcfg-files/ And ONBOOT specifies YES to o indicate whether the device should be enabled when Linux boots up.

NEW QUESTION # 262
An engineer is working on a production application deployment that requires changing a web application property file called server.propertythat is managed by the Git version control system. A cloned copy of the remote repository in which the server.propertyfile exists is on the local desktop computer. The engineer makes appropriate changes to the files, saves it as server.property, and executes git commit -m "changed the property file" server.property. Which of the following commands did the engineer fail to perform?

A. git add server.property
B. git merge server.property
C. git init server.property
D. git push server.property

Answer: D

Explanation:
https://www.earthdatascience.org/workshops/intro-version-control-git/basic-git-commands/

NEW QUESTION # 263
Some servers in an organization have been compromised. Users are unable to access to the organization's web page and other services. While reviewing the system log, a systems administrator notices messages from the kernel regarding firewall rules:

Which of the following commands will remediate and help resolve the issue?

Answer: A

Explanation:
The command iptables -F will remediate and help resolve the issue. The issue is caused by the firewall rules that block the access to the organization's web page and other services. The output of dmesg | grep firewall shows that the kernel has dropped packets from the source IP address 192.168.1.100 to the destination port 80, which is the default port for HTTP. The command iptables -F will flush all the firewall rules and allow the traffic to pass through. This command will resolve the issue and restore the access to the web page and other services. The other options are incorrect because they either do not affect the firewall rules (ip route flush or ip addr flush) or do not exist (iptables -R). References: CompTIA Linux+ (XK0-005) Certification Study Guide, Chapter 18: Securing Linux Systems, page 543.

NEW QUESTION # 264
......

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