Bash Test

To run a copy command in a subshell, which syntax would you use?

( COMMAND )

(( COMMAND ))

SH COMMAND

{ COMMAND; }

To permanently remove empty lines from a file called textfile, which command could you use?

SED -I '/^$/D' TEXTFILE

SED '/^$/D' TEXTFILE

SED -I 'S/^$//' TEXTFILE

CAT TEXTFILE | SED '/^$/D'

What happens if you use set -e in a Bash script?

IT WILL CAUSE BASH TO EXIT IF A FUNCTION OR SUBSHELL RETURNS A NONZERO STATUS CODE.

IT WILL CAUSE BASH TO EXIT IF LOCAL, DECLARE, OR TYPESET ASSIGNMENTS RETURN A NONZERO STATUS CODE.

IT WILL CAUSE BASH TO EXIT IF A CONDITIONAL RETURNS A NON-ZERO STATUS CODE.

IT WILL CAUSE BASH TO EXIT IF A COMMAND, LIST OF COMMANDS, COMPOUND COMMAND, OR POTENTIALLY A PIPELINE RETURNS A NONZERO STATUS CODE.

The _____ keyword pauses the script to get input from standard input.

GET

READ

INPUT

ARGUMENT

How does the SUID or setuid affect executable commands?

WHEN THE COMMAND CREATES FILES, THEY WILL BE OWNED BY THE GROUP OWNER OF THE COMMAND.

THE SUID BIT ALLOWS ANYONE TO EXECUTE THE COMMAND NO MATTER WHAT OTHER PERMISSIONS ARE SET.

WHEN THE COMMAND IS EXECUTED, ITS RUNNING PRIVILEGES ELEVATE TO THE USER OWNER OF THE COMMAND.

WHEN THE COMMAND IS EXECUTED, ITS RUNNING PRIVILEGES ELEVATE TO THE GROUP

In order to extract text from the first column of file called textfile, which command would you use?

CAT {$1,TEXTFILE}

CAT TEXTFILE | AWK '{PRINT $1}'

CAT TEXTFILE | AWK [PRINT $1]

AWK TEXTFILE {PRINT $1}

Which arithmetic expression will give the most precise answer?

VAR=$(( 10 / 8 ))

(( VAR= 10 /8 ))

VAR=$( EXPR 10 / 8 )

VAR=$(ECHO 'SCALE=2; 10 / 8' | BC)

What is the result of this script? - TODO add script

0, REPRESENTING 'TRUE', BECAUSE THE VARIABLE

0, REPRESENTING 'TRUE', BECAUSE EVERYBODY LOVES PENGUINS!

1, REPRESENTING 'FALSE', BECAUSE THE VARIABLE

In order for a Bash script to be executed like an OS command, it should start with a shebang line. What does this look like?

#/USR/BIN/ENV BASH

#!/USR/BIN/ENV BASH

`$!/USR/BIN/ENV BASH

~/USR/BIN/ENV BASH

Suppose your current working directory is your home directory. How could you run the script demo.sh that is located in your home directory? Find three correct answers. A. /home/demo.sh B. ./demo.sh C. ~/demo.sh D. bash /home/demo.sh E. bash demo.sh

B, C, E

C, D, E

B, D, E

A, B, C

What do you use in a case statement to tell Bash that you're done with a specific test?

$$

;;

DONE

::

What Bash script will correctly create these files?

TOUCH FILE{1+10}.TXT

TOUCH FILE{1..10}.TXT

TOUCH FILE{1-10}.TXT

TOUCH FILE(1..10).TXT

Which variable would you check to verify that the last command executed successfully?

$@

$!

$$

$?

How can you gather history together for multiple terminals?

SHOPT -S HISTAPPEND

HISTORY --SHARED

HISTORY --COMBINED

IT JUST WORKS BY DEFAULT.

What is the difference between the $@ and $* variables?

$* TREATS EACH QUOTED ARGUMENT AS A SEPARATE ENTITY. $@ TREATS THE ENTIRE ARGUMENT STRING AS ONE ENTITY.

$* IS USED TO COUNT THE ARGUMENTS PASSED TO A SCRIPT, $@ PROVIDES ALL ARGUMENTS IN ONE STRING.

$* IS THE WILDCARD THAT INCLUDES ALL ARGUMENTS WITH WORD SPLITTING, $@ HOLDS THE SAME DATA BUT IN AN ARRAY.

$@ TREATS EACH QUOTED ARGUMENT AS A SEPARATE ENTITY. $* TREATS THE ENTIRE ARGUMENT STRING AS ONE ENTITY.

Which file allows you to save modifications to the shell environment across sessions?

~/.PROFILE

/ETC/BASH.CONF

/ETC/BASHPROFILE

~/PROFILE

How would you find the last copy command run in your history?

HISTORY | GREP CP

CP HISTORY

GREP CP HISTORY

HISTORY | FIND CP

When executing a command and passing the output of that command to another command, which character allows you to chain these commands together?

|

->

@

#

Which statement checks whether the variable num is greater than five?

$NUM > 5

(( $NUM > 5 ))

[[ $NUM -LT 5 ]]

(( $NUM -GT 5 ))

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Exam Type:	Bash MCQ Skill Test
Questions Type:	Multiple Choice Questions
Total Questions:	19
Time Limit:	30 Minutes
Last Update	July, 2025

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