Linux - Intro - multichoice questions

The ls command is used to list directory contents. Use the ls --help command and the below sample invocations to answer the next 4 questions.

myuser@localhost:~$ touch --help
Usage: touch [OPTION]... FILE...
...
myuser@localhost:~$ ls /etc
debian_version      host.conf           lsb-release
…
myuser@localhost:~$ lss /etc
-bash: lss: command not found
myuser@localhost:~$ ls -z /etc
ls: invalid option -- 'z'
Try 'ls --help' for more information.

Question 1

Which best describes why myuser got the "command not found" error message when running lss /etc?

• The directory /etc does not exist.
• myuser misspelled the command name, and no command named lss could be found.
• The ls command requires a mandatory -a flag.
• myuser does not have the right permissions to execute the command.

Question 2

Which best describes why myuser got the "invalid option" error message when running touch ls -z /etc?

• The directory /etc does not exist.
• myuser misspelled the command name, and no command named lss could be found.
• The ls command requires a mandatory -a flag.
• The ls command doesn't support the -z flag.

Question 3

When myuser ran the command ls /etc, what best describes the role of the word /etc?

• The word serves as an argument to the ls command.
• The word serves as a parameter to the -r flag.
• The word serves as the name of the command to run.
• The word is misplaced, and caused the command to exit in failure.

Question 4

Which of the following would be a legitimate invocation of the ls command?

• ls /etc -a
• ls --nolist /etc
• ls -l/etc
• ls -l /etc

Question 5

Which control sequence causes bash to clear the screen?

• CTRL+C
• CTRL+D
• CTRL+L
• CTRL+S
• CTRL+U

Question 6

Which command will list the contents of the directory report recursively?

• lsdir report
• ls --recur report
• ls -r report
• ls -R report
• ls report \r

Question 7

Which of the following is an absolute directory reference?

• /home/student
• ../etc
• ..
• home/myuser

Question 8

Which of the following is a relative directory reference?

• /home/student
• /etc
• ..
• ~

Question 9

Which of the following could have been displayed by pwd?

• home/student
• /etc
• ..
• ~

Question 10

Following the command cd ~, which is the most likely result from pwd?

• /home/myuser
• /etc
• ..
• ~

Question 11

The file named.conf is a system configuration file. This file belongs in

• /tmp
• /etc
• /bin
• /home/myuser

Question 12

The file e2fsck is a privileged command that must always be available to the system and being used by the system admin. This file would be found in

• /tmp
• /etc
• /var/lib
• /sbin

Question 13

Which of the following commands could not be used to create a file in /tmp?

• touch /newfile
• touch /tmp/newfile
• touch ../newfile
• touch ../tmp/newfile

Question 14

Use the file command to help answer the question.

What type of file is /dev/log?

• A character special file
• A block special file
• A socket
• A symbolic link
• A compiled ELF object

Question 15

Which of the following commands would display the first 5 lines of the file /etc/passwd?

• head -5 /etc/passwd
• head -n /etc/passwd
• head --five /etc/passwd
• head /etc/passwd > 5
• head /5 /etc/passwd

Question 16

What type of file is /usr/bin/md5sum?

• A compiled ELF object
• An Awk script
• A Bash (Bourne-Again) shell script
• A Symbolic Link
• A /usr/bin/perl script

Question 17

Given the path /home/username/secret.txt, choose the correct sentence:

• secret.txt is a file
• secret.txt is a directory
• secret.txt can be either file or a directory
• None of the above