XK0-005日本語版対応参考書 & XK0-005シュミレーション問題集

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CompTIA Linux+ Certification Exam 認定 XK0-005 試験問題 (Q812-Q817):

質問 # 812
An administrator is trying to diagnose a performance issue and is reviewing the following output:

System Properties:
CPU: 4 vCPU
Memory: 40GB
Disk maximum IOPS: 690
Disk maximum throughput: 44Mbps | 44000Kbps
Based on the above output, which of the following BEST describes the root cause?

A. The system has reached its maximum permitted throughput, therefore iowait is increasing.
B. The system has a partitioned disk, which causes the IOPS to be doubled.
C. The system has reached its maximum IOPS, causing the system to be slow.
D. The system is mostly idle, therefore the iowait is high.

正解：A

解説：
Explanation
The system has reached its maximum permitted throughput, therefore iowait is increasing. The output of iostat
-x shows that the device sda has an average throughput of 44.01 MB/s, which is equal to the disk maximum throughput of 44 Mbps. The output also shows that the device sda has an average iowait of 99.99%, which means that the CPU is waiting for the disk to complete the I/O requests. This indicates that the disk is the bottleneck and the system is slow due to the high iowait. The other options are incorrect because they are not supported by the outputs. The system has not reached its maximum IOPS, as the device sda has an average IOPS of 563.50, which is lower than the disk maximum IOPS of 690. The system is not mostly idle, as the output of top shows that the CPU is 100% busy. The system does not have a partitioned disk, as the output of lsblk shows that the device sda has only one partition sda1. References: CompTIA Linux+ (XK0-005) Certification Study Guide, Chapter 17: Optimizing Linux Systems, pages 513-514.

質問 # 813
A Linux administrator found many containers in an exited state. Which of the following commands will allow the administrator to clean up the containers in an exited state?

A. docker rm $ (docker ps -aq)
B. docker rm -- all
C. docker images prune *
D. docker rm -- state exited

正解：A

解説：
This command will remove all containers, regardless of their state, by passing the IDs of all containers to the docker rm command. The docker ps -aq command will list the IDs of all containers, including the ones in an exited state, and the $ ( ) syntax will substitute the output of the command as an argument for the docker rm command. This is a quick and easy way to clean up all containers, but it may also remove containers that are still needed or running.
Reference
docker rm | Docker Docs - Docker Documentation, section "Remove all containers" Docker Remove Exited Containers | Easy methods. - Bobcares, section "For removing all exited containers"

質問 # 814
A technician just fixed a few issues in some code and is ready to deploy the code into production. Which of the following steps should the technician take next?

A. Create a new branch using git checkout.
B. Perform a git pull to update the local copy of the code.
C. Create a git pull request to merge into main.
D. Perform a git clone to pull main down.

正解：C

解説：
After fixing issues in the code, the next step is to merge these changes into the main branch. This is typically done by creating a pull request78.
References:7(https://zeet.co/blog/deploy-to-production)8(https://stackoverflow.com/questions/11833511/git- deploy-to-production)

質問 # 815
The security team has identified a web service that is running with elevated privileges A Linux administrator is working to change the systemd service file to meet security compliance standards. Given the following output:

Which of the following remediation steps will prevent the web service from running as a privileged user?

A. Removing the ExecStarWusr/sbin/webserver -D SOPTIONS from the service file
B. Adding the User-webservice to the [Service] section of the service file
C. Changing the:nulti-user.target in the [Install] section to basic.target
D. Updating the Environment File line in the [Service] section to/home/webservice/config

正解：B

解説：
Explanation
The remediation step that will prevent the web service from running as a privileged user is adding the User=webservice to the [Service] section of the service file. The service file is a configuration file that defines the properties and behavior of a systemd service. The systemd is a system and service manager that controls the startup and operation of Linux systems. The service file contains various sections and options that specify how the service should be started, stopped, and managed. The [Service] section defines how the service should be executed and what commands should be run. The User option specifies the user name or ID that the service should run as. The webservice is the name of the user that the administrator wants to run the web service as.
The administrator should add the User=webservice to the [Service] section of the service file, which will prevent the web service from running as a privileged user, such as root, and improve the security of the system. This is the correct remediation step to use to prevent the web service from running as a privileged user. The other options are incorrect because they either do not change the user that the service runs as (removing the ExecStart=/usr/sbin/webserver -D OPTIONS from the service file or updating the EnvironmentFile line in the [Service] section to /home/webservice/config) or do not affect the user that the service runs as (changing the multi-user.target in the [Install] section to basic.target). References: CompTIA Linux+ (XK0-005) Certification Study Guide, Chapter 15: Managing System Services, page 458.

質問 # 816
A Linux administrator is trying to remove the ACL from the file /home/user/data. txt but receives the following error message:

Given the following analysis:

Which of the following is causing the error message?

A. File attributes are preventing file modification.
B. SELinux file context is denying the ACL changes.
C. The filesystem is mounted with the wrong options.
D. The administrator is not using a highly privileged account.

正解：A

解説：
File attributes are preventing file modification, which is causing the error message. The output of lsattr /home
/user/data.txt shows that the file has the immutable attribute (i) set, which means that the file cannot be changed, deleted, or renamed. The command setfacl -b /home/user/data.txt tries to remove the ACL from the file, but fails because of the immutable attribute. The administrator needs to remove the immutable attribute first by using the command chattr -i /home/user/data.txt and then try to remove the ACL again. The other options are incorrect because they are not supported by the outputs. The administrator is using a highly privileged account, as shown by the # prompt. The filesystem is mounted with the correct options, as shown by the output of mount | grep /home. SELinux file context is not denying the ACL changes, as shown by the output of ls -Z /home/user/data.txt. References: CompTIA Linux+ (XK0-005) Certification Study Guide, Chapter 11: Managing Files and Directories, pages 357-358.

質問 # 817
......

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XK0-005日本語版対応参考書 & XK0-005シュミレーション問題集

試験の準備方法-有難いXK0-005日本語版対応参考書試験-権威のあるXK0-005シュミレーション問題集

CompTIA Linux+ Certification Exam 認定 XK0-005 試験問題 (Q812-Q817):

早速ダウンロードCompTIA XK0-005: CompTIA Linux+ Certification Exam日本語版対応参考書 - 高品質CertJuken XK0-005シュミレーション問題集

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