XK0-005テスト参考書 - CompTIA Linux+ Certification Examに合格するための最も賢い選択なぜ我々社は試験に合格しないなら、全額での返金を承諾するのは大勢の客様が弊社のCompTIA XK0-005問題集を使用して試験に合格するのは我々に自信を与えるからです。CompTIA XK0-005試験はIT業界での人にとって、とても重要な能力証明である一方で、大変難しいことです。それで、弊社の専門家たちは多くの時間と精力を尽くし、CompTIA XK0-005試験資料を研究開発されます。 CompTIA Linux+ Certification Exam 認定 XK0-005 試験問題 (Q774-Q779):質問 # 774
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. Run git exclude app. conf.
B. Add app . conf to . exclude.
C. Run git stash app. conf.
D. Add app . conf to . gitignore.
正解：D
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 # 775
A systems administrator is checking the system logs. The administrator wants to look at the last 20 lines of a log. Which of the following will execute the command?
A. tail -l 20
B. tail -n 20
C. tail -c 20
D. tail -v 20
正解：B
解説：
The command tail -n 20 will display the last 20 lines of a file. The -n option specifies the number of lines to show. This is the correct command to execute the task. The other options are incorrect because they either use the wrong options (-v, -c, or -l) or have the wrong arguments (20 instead of 20 filename). Reference: CompTIA Linux+ (XK0-005) Certification Study Guide, Chapter 11: Managing Files and Directories, page 352.
質問 # 776
An application requires a configuration file be placed in each user's home directory when an account is created. In which of the following locations should the administrator place the configuration file?
A. /etc/rc.local
B. /etc/ssh
C. /etc/ske1
D. /etc/sysconfig
正解：C
質問 # 777
A Linux administrator is troubleshooting the root cause of a high CPU load and average.
Which of the following commands will permanently resolve the issue?
A. pstree -p 6295
B. kill -9 6295
C. iostat -cy 1 5
D. renice -n -20 6295
正解：B
解説：
Explanation
The command that will permanently resolve the issue of high CPU load and average is kill -9 6295. This command will send a SIGKILL signal to the process with the PID 6295, which is the process that is consuming 99.7% of the CPU according to the top output. The SIGKILL signal will terminate the process immediately and free up the CPU resources. The kill command is used to send signals to processes by PID or name.
The other options are not correct commands for resolving this issue. The renice -n -20 6295 command will change the priority (niceness) of the process with PID 6295 to -20, which is the highest priority possible. This will make the process more CPU-intensive, not less. The renice command is used to change the priority of running processes. The pstree -p 6295 command will show a tree of processes with PID 6295 as the root. This will not affect the CPU load or average, but only display information. The pstree command is used to display a tree of processes. The iostat -cy 1 5 command will show CPU and disk I/O statistics for 5 iterations with an interval of 1 second. This will also not affect the CPU load or average, but only display information. The iostat command is used to report CPU and I/O statistics. References: CompTIA Linux+ (XK0-005) Certification Study Guide, Chapter 11: Troubleshooting Linux Systems; kill(1) - Linux manual page; renice(1) - Linux manual page; pstree(1) - Linux manual page; iostat(1) - Linux manual page
質問 # 778
A Linux systems administrator is resolving a privileged access issue for users who are members of an admin group. Which of the following configuration files should the administrator update so the users in the admin group will have root privileged access to the Linux system?
A. /etc/group
B. /etc/sudoers
C. /etc/login.defs
D. /etc/shadow
正解：B
解説：
To grant sudo/root privileges to a group (like admin), the correct file to edit is:
bash
/etc/sudoers
This is where privilege escalation rules are defined. A line such as:
bash
%admin ALL=(ALL) ALL
will grant all users in the admin group root privileges.
* /etc/login.defs controls general login settings.
* /etc/group defines group membership but does not assign privileges.
* /etc/shadow holds encrypted passwords and is not relevant here.
Reference:CompTIA Linux+ XK0-005 Official Study Guide, Domain 6.0 - User and Group Management
"To allow members of a group to execute commands with root privileges, update the /etc/sudoers file using visudo."
