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CompTIA XK0-006 Exam Syllabus Topics:
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Reference: https://www.comptia.org/en-us/certifications/linux/v8/#overview
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CompTIA Linux+ Certification Sample Questions:
A Linux administrator notices that an application is having trouble connecting to an external database. Which of the following commands should the administrator use to validate the connection to the remote port exposed by a database server?
- A. ss -plant | qrep 3306
- B. nc -v db.comptia.org 3306
- C. arp -an | grcp db.comptia.org | grcp 3306
- D. dig MX db.complia.org:3306
Correct Answer: B 🗳️
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A Linux administrator has been informed that user alpha is able to successfully access the
/project2/data/ directory, but user beta is not. The administrator observes the following during troubleshooting:
The directory permissions are as follows:
Which of the following would most likely cause the access discrepancy?
- A. There is an SELinux context preventing user betafrom accessing the directory.
- B. User alpha is a member of a group nested within the project2 group.
- C. There is an ACL configured for user alpha on the /project2/data directory.
- D. User beta is not a member of the project2 group or subgroups.
Correct Answer: C 🗳️
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A Linux administrator receives reports that an application hosted in a system is not completing tasks in the allocated time. The administrator connects to the system and obtains the following details:
Which of the following actions can the administrator take to help speed up the jobs?
- A. Increase the amount of free memory available to the system.
- B. Increase the amount of disks available to the system.
- C. Increase the amount of swap space available to the system.
- D. Increase the amount of CPU resources available to the system.
Correct Answer: D 🗳️
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Users connecting to a MySQL database on a Linux system report frequent errors. An administrator reviews the following partial output of the /proc/meminfo and freecommands:
Which of the following should the administrator do to ensure that the MySQL service will continue to run even if the system runs out of swap space? (Choose two.)
- A. Issue the mkswap /dev/sda2; swapon -v /dev/sda2 command.
- B. Issue the sysctl -w vm.overconunit_memory=2 command.(Invalid key)
- C. Issue the dd if=/dev/zero of=/swapfile bs=1024 count=65536 command.
- D. Use disk quotas on the swap space to prevent MySQL from overutilizing the swap partition.
- E. Issue the sysctl -w vm.overcommit_ratio=100 command.
- F. Reload the /etc/fstab file by issuing the mount -a command.(Not sufficient alone)
Correct Answer: A,C 🗳️
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A systems administrator wants to prevent the current contents of a file from being overwritten and wants to allow new additions at the end of the file. Which of the following commands should the administrator use?
- A. setfacl -m m::t file
- B. setenforce file
- C. chmod +t file
- D. chattr +a file
Correct Answer: D 🗳️
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