CompTIA XK0-005日本語版復習指南 & XK0-005試験解説

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CompTIA Linux+ Certification Exam衝動的にまたは考慮せずに何かを購入すると、望ましくない選択につながる可能性があります。その結果を防ぐために,CompTIA Linux+ Certification Examトレーニング資料を用意しました。これらは、保証期間中の専門的な練習資料です。参考のために許容できる価格に加えて、3つのバージョンのすべての資料は、10年以上にわたってこの分野の専門家によって編集されています。さらに、一連の利点があります。したがって、CompTIA Linux+ Certification Examの実際のテストの重要性は言うまでもありません。今すぐご注文いただいた場合、1年間無料の更新をお送りします。これらのサプリメントはすべて、CompTIA Linux+ Certification ExamのXK0-005模擬試験にも役立ちます。

CompTIA XK0-005認定試験は、システムアーキテクチャ、Linuxインストールとパッケージ管理、Linuxコマンドラインツール、スクリプトと自動化、ネットワークの基礎、セキュリティなど、幅広いトピックをカバーしています。試験の目的は、Linuxシステム管理者に必要な主要なスキルと知識をカバーするように設計されています。試験は、複数選択肢の問題から構成され、候補者には90分間の試験時間が与えられます。

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CompTIA Linux+ Certification Exam 認定 XK0-005 試験問題 (Q57-Q62):

質問 # 57
A Linux administrator has installed a web server, a database server, and a web application on a server. The web application should be active in order to render the web pages. After the administrator restarts the server, the website displays the following message in the browser: Error establishing a database connection. The Linux administrator reviews the following relevant output from the systemd init files:

The administrator needs to ensure that the database is available before the web application is started. Which of the following should the administrator add to the HTTP server .service file to accomplish this task?

A. TRIGGERS=mariadb.service
B. ONFAILURE=mariadb.service
C. REQUIRES=mariadb.service
D. WANTEDBY=mariadb.service

正解：C

解説：
The administrator should add REQUIRES=mariadb.service to the HTTP server .service file to ensure that the database is available before the web application is started. This directive specifies that the HTTP server unit requires the MariaDB server unit to be started before it can run. If the MariaDB server unit fails to start or stops for any reason, the HTTP server unit will also fail or stop. This way, the dependency between the web application and the database is enforced by systemd.
The other options are not correct directives for accomplishing this task. TRIGGERS=mariadb.service is not a valid directive in systemd unit files. ONFAILURE=mariadb.service means that the HTTP server unit will start only if the MariaDB server unit fails, which is not what we want. WANTEDBY=mariadb.service means that the HTTP server unit will be started when the MariaDB server unit is enabled, but it does not imply a strong dependency or ordering relationship between them. References: CompTIA Linux+ (XK0-005) Certification Study Guide, Chapter 10: Managing Services with systemd; systemd.unit(5) - Linux manual page

質問 # 58
A Linux system is failing to boot with the following error:

Which of the following actions will resolve this issue? (Choose two.)

A. Fix the partition modifying /etc/default/grub and reboot.
B. Interrupt the boot process in the GRUB menu and add single to the kernel line.
C. Execute grub-install --root-directory=/mnt and reboot.
D. Interrupt the boot process in the GRUB menu and add rescue to the kernel line.
E. Execute grub-install /dev/sdX and reboot.
F. Boot the system on a LiveCD/ISO.

正解：E、F

解説：
Explanation
The administrator should do the following two actions to resolve the issue:
Boot the system on a LiveCD/ISO. This is necessary to access the system and repair the boot loader. A LiveCD/ISO is a bootable media that contains a Linux distribution that can run without installation. The administrator can boot the system from the LiveCD/ISO and mount the root partition of the system to a temporary directory, such as /mnt.
Execute grub-install /dev/sdX and reboot. This will reinstall the GRUB boot loader to the disk device, where sdX is the device name of the disk, such as sda or sdb. The GRUB boot loader is a program that runs when the system is powered on and allows the user to choose which operating system or kernel to boot. The issue is caused by a corrupted or missing GRUB boot loader, which prevents the system from booting. The command grub-install will restore the GRUB boot loader and fix the issue.
The other options are incorrect because they either do not fix the boot loader (interrupt the boot process in the GRUB menu or fix the partition modifying /etc/default/grub) or do not use the correct syntax (grub-install
--root-directory=/mnt instead of grub-install /dev/sdX or rescue or single instead of recovery in the GRUB menu). References: CompTIA Linux+ (XK0-005) Certification Study Guide, Chapter 8: Managing the Linux Boot Process, pages 265-266.

質問 # 59
Application code is stored in Git. Due to security concerns, the DevOps engineer does not want to keep a sensitive configuration file, app . conf, in the repository. Which of the following should the engineer do to prevent the file from being uploaded to the repository?

A. Add app . conf to . gitignore.
B. Run git exclude app. conf.
C. Run git stash app. conf.
D. Add app . conf to . exclude.

正解：A

解説：
Explanation
This will prevent the file app.conf from being tracked by Git and uploaded to the repository. The .gitignore file is a special file that contains patterns of files and directories that Git should ignore. Any file that matches a pattern in the .gitignore file will not be staged, committed, or pushed to the remote repository. The .gitignore file should be placed in the root directory of the repository and committed along with the other files.
The other options are incorrect because:
A: Run git exclude app.conf
This is not a valid Git command. There is no such thing as git exclude. The closest thing is git update-index
--assume-unchanged, which tells Git to temporarily ignore changes to a file, but it does not prevent the file from being uploaded to the repository.
B: Run git stash app.conf
This will temporarily save the changes to the file app.conf in a stash, which is a hidden storage area for uncommitted changes. However, this does not prevent the file from being tracked by Git or uploaded to the repository. The file will still be part of the working tree and the index, and it will be restored when the stash is popped or applied.
C: Add app.conf to .exclude
This will have no effect, because Git does not recognize a file named .exclude. The only files that Git uses to ignore files are .gitignore, $GIT_DIR/info/exclude, and core.excludesFile.
References:
Git - gitignore Documentation
D:gitignore file - ignoring files in Git | Atlassian Git Tutorial
Ignoring files - GitHub Docs
[CompTIA Linux+ Certification Exam Objectives]

質問 # 60
An administrator needs to make some changes in the IaC declaration templates. Which of the following commands would maintain version control?

A. git clone https://github.com/comptia/linux+-.gitgit push origin
B. git clone https://qithub.com/comptia/linux+-.gitgit fetch New-Branch
C. git clone https://github.com/comptia/linuxt+-.gitgit checkout -b <new-branch>
D. git clone https://github.com/comptia/linux+-.gitgit status

正解：C

解説：
The command that will maintain version control while making some changes in the IaC declaration templates is git checkout -b <new-branch>. This command uses the git tool, which is a distributed version control system that tracks changes in source code and enables collaboration among developers. The checkout option switches to a different branch in the git repository, where a branch is a pointer to a specific commit in the history. The -b option creates a new branch with the given name, and switches to it. This way, the administrator can make changes in the new branch without affecting the main branch, and later merge them if needed.
The other options are not correct commands for maintaining version control while making some changes in the IaC declaration templates. The git clone https://github.com/comptia/linux±.git command will clone an existing repository from a remote URL to a local directory, but it will not create a new branch for making changes. The git push origin command will push the local changes to a remote repository named origin, but it will not create a new branch for making changes. The git fetch New-Branch command will fetch updates from a remote branch named New-Branch, but it will not create a new branch for making changes. References: CompTIA Linux+ (XK0-005) Certification Study Guide, Chapter 19: Managing Source Code; Git - Basic Branching and Merging

質問 # 61
A new IO card has been added to the security server to log the opening and closing of the main entrance.
A switch is attached, so the interface card returns a 1 when the door is opened and a 0 when the door is closed.
Which of the following describes the Linux device to which this switch is attached?

A. /dev/gpio
B. /dev/port
C. /dev/tty0
D. /dev/sg0

正解：A

解説：
GPIO (Genaral Purpose Input Outputs) signals are interpreted.

質問 # 62
......

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CompTIA XK0-005日本語版復習指南 & XK0-005試験解説

XK0-005認定に関する最高のCompTIA XK0-005受験問題集

CompTIA Linux+ Certification Exam 認定 XK0-005 試験問題 (Q57-Q62):

XK0-005試験の準備方法｜効率的なXK0-005日本語版復習指南試験｜最新なCompTIA Linux+ Certification Exam試験解説

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