Practical 101-500 Q&A 2021

NEW QUESTION 1

Creating a hard link to an ordinary file returns an error. What could be the reason for this?

• A. The source file is hidden.
• B. The source file is read-only.
• C. The source file is a shell script.
• D. The source file is already a hard link.
• E. The source and the target are on different filesystems.

Answer: E

NEW QUESTION 2

Which command creates a swap space on a block device or a file? (Specify ONLY the command without any path or parameters.)

• A. Mastered
• B. Not Mastered

Answer: A

Explanation:
mkswap

NEW QUESTION 3

A faulty kernel module is causing issues with a network interface card. Which of the following actions ensures that this module is not loaded automatically when the system boots?

• A. Using lsmod --remove --autoclean without specifying the name of a specific module
• B. Using modinfo –k followed by the name of the offending module
• C. Using modprobe –r followed by the name of the offending module
• D. Adding a blacklist line including the name of the offending module to the file/etc/modprobe.d/blacklist.conf
• E. Deleting the kernel module’s directory from the file system and recompiling the kernel, including its modules

Answer: D

NEW QUESTION 4

Which of the following kernel parameters instructs the kernel to suppress most boot messages?

• A. silent
• B. verbose=0
• C. nomesg
• D. quiet

Answer: D

NEW QUESTION 5

The system is having trouble and the engineer wants to bypass the usual /sbin/init start up and run /bin/sh. What is the usual way to pass this change to the kernel from your boot loader?

• A. Start in runlevel 1.
• B. Pass init=/bin/sh on the kernel parameter line.
• C. Pass /bin/sh on the kernel parameter line.
• D. Pass start=/bin/sh on the kernel parameter line.

Answer: B

NEW QUESTION 6

Which file should be edited to select the network locations from which Debian installation package files are loaded?

• A. /etc/dpkg/dpkg.cfg
• B. /etc/apt/apt.conf
• C. /etc/apt/apt.conf.d
• D. /etc/apt/sources.list
• E. /etc/dpkg/dselect.cfg

Answer: D

NEW QUESTION 7

Which command must be entered before exiting vi to save the current file as filea.txt?

• A. %s filea.txt
• B. %w filea.txt
• C. :save filea.txt
• D. :w filea.txt
• E. :s filea.txt

Answer: D

NEW QUESTION 8

Which command is used to query information about the available packages on a Debian system?

• A. apt-cache
• B. apt-get
• C. apt-search
• D. dpkg
• E. dpkg-search

Answer: A

NEW QUESTION 9

From a Bash shell, which of the following commands directly executes the instruction from the file
/usr/local/bin/runme.sh without starting a subshell? (Please select TWO answers.)

• A. source /usr/local/bin/runme.sh
• B. . /usr/local/bin/runme.sh
• C. /bin/bash /usr/local/bin/runme.sh
• D. /usr/local/bin/runme.sh
• E. run /usr/local/bin/runme.sh

Answer: AB

NEW QUESTION 10

Which of the following are valid stream redirection operators within Bash? (Choose THREE correct answers.)

• A. <
• B. <<<
• C. >
• D. >>>
• E. %>

Answer: ABC

NEW QUESTION 11

The dpkg-____ command will ask configuration questions for a specified package, just as if the package were being installed for the first time.

• A. Mastered
• B. Not Mastered

Answer: A

Explanation:
reconfigure

NEW QUESTION 12

Which of the following options for the kernel's command line changes the systemd boot target to rescue.target instead of the default target?

• A. systemd.target=rescue.target
• B. systemd.runlevel=rescue.target
• C. systemd.service=rescue.target
• D. systemd.default=rescue.target
• E. systemd.unit=rescue.target

Answer: E

NEW QUESTION 13

Which of the following commands will change all CR-LF pairs in an imported text file, userlist.txt, to Linux standard LF characters and store it as newlist.txt?

• A. tr ‘rn’ ‘’ < userlist.txt > newlist.txt
• B. tr –c ‘nr’ ‘’ < newlist.txt > userlist.txt
• C. tr –d ‘r’ < userlist.txt > newlist.txt
• D. tr ‘r’ ‘n’ userlist.txt newlist.txt
• E. tr –s ‘^M’ ‘^J’ userlist.txt newlist.txt

Answer: C

NEW QUESTION 14

Which of the following commands determines the type of a file by using a definition database file which contains information about all common file types?

• A. magic
• B. type
• C. file
• D. pmagic
• E. hash

Answer: C

NEW QUESTION 15

Which of the following statements are true about the boot sequence of a PC using a BIOS? (Choose two.)

• A. Some parts of the boot process can be configured from the BIOS
• B. Linux does not require the assistance of the BIOS to boot a computer
• C. The BIOS boot process starts only if secondary storage, such as the hard disk, is functional
• D. The BIOS initiates the boot process after turning the computer on
• E. The BIOS is started by loading hardware drivers from secondary storage, such as the hard disk

Answer: AD

NEW QUESTION 16

Which of the following commands set the sticky bit for the directory /tmp? (Choose TWO correct answers.)

• A. chmod +s /tmp
• B. chmod +t /tmp
• C. chmod 1775 /tmp
• D. chmod 4775 /tmp
• E. chmod 2775 /tmp

Answer: BC

NEW QUESTION 17

Which of the following commands are common Linux commands for file management? (Choose three correct answers.)

• A. copy
• B. mv
• C. move
• D. cp
• E. mkdir

Answer: BDE

NEW QUESTION 18

Which of the following apt-get subcommands installs the newest versions of all currently installed packages?

• A. auto-update
• B. dist-upgrade
• C. full-upgrade
• D. install
• E. update

Answer: E

NEW QUESTION 19

What does the ? symbol within regular expressions represent?

• A. Match the preceding qualifier one or more times.
• B. Match the preceding qualifier zero or more times.
• C. Match the preceding qualifier zero or one times.
• D. Match a literal ?character.

Answer: C

NEW QUESTION 20

Which of the following file permissions belong to a symbolic link?

• A. -rwxrwxrwx
• B. +rwxrwxrwx
• C. lrwxrwxrwx
• D. srwxrwxrwx

Answer: C

NEW QUESTION 21

Which of the following commands brings a system running SysV init into a state in which it is safe to perform maintenance tasks? (Choose TWO correct answers.)

• A. shutdown -R 1 now
• B. shutdown -single now
• C. init 1
• D. telinit 1
• E. runlevel 1

Answer: CD

NEW QUESTION 22

Which command is used to create and initialize the files used to store quota information? (Specify ONLY the command without any path or parameters.)

• A. Mastered
• B. Not Mastered

Answer: A

Explanation:
quotacheck

NEW QUESTION 23

Which of the following commands updates the linker cache of shared libraries?

• A. mkcache
• B. soconfig
• C. mkldconfig
• D. lddconfig
• E. ldconfig

Answer: E

NEW QUESTION 24

Which of the following commands is used to change metadata and options for ext3 filesystems?

• A. mod3fs
• B. tune3fs
• C. mod2fs
• D. tune2fs
• E. dump2fs

Answer: D

NEW QUESTION 25

Which wildcards will match the following filenames? (Choose two.) ttyS0
ttyS1 ttyS2

• A. ttyS[1-5]
• B. tty?[0-5]
• C. tty*2
• D. tty[A-Z][012]
• E. tty[Ss][02]

Answer: BD

NEW QUESTION 26

What is the maximum niceness value that a regular user can assign to a process with the nice command when executing a new process?

• A. 9
• B. 19
• C. 49
• D. 99

Answer: B

NEW QUESTION 27
......