USP LAB Quiz

Identify the wrong answer for the below Command.

chmod 676 a.txt

• chmod u=rw-,g=rwx,o=rw- a.txt

• chmod u=rwx,g=rwx,o=rw- u-x a.txt

• chmod u=rw-,g=rwx,o=rw- u-x a.txt

• None of the above

Which command is used to display the last 10 lines of a file?

• head

• tail

• more

• less

What command is used to display information about only logged-in user in Linux?

• who

• users

• logged

• whoami

Select appropriate answer for creating a file in Linux?

• touch

• vi

• ls > b.txt

• All of the above

What is the command to exit from the VI editor without saving the content.

• :wq

• :x

• :q!

• :q

What is the purpose of the first line (shebang) in a shell script?

• It defines the author of the script.

• It specifies the interpreter to be used for executing the script.

• It provides a summary of the script's functionality.

• It gives path of the shell used

What is the output of the following expression in shell programming?

[ 10 -eq 5 ]

• True

• False

• Error: Invalid syntax.

• Error: Numeric comparison not supported.

Which operator is used to check if a string is empty in shell programming?

• -z

• -n

• -s

• -e

Which operator is used to check if a file exists and is executable in shell programming?

• -x

• -e

• -f

• -r

Which operator is used to check if two integers are not equal in shell programming?

• !=

• <>

• -ne

• ~