Shell Scripting Quiz (Set 16)

Shell Scripting (Set 6)

1 / 10

In a shell script, how do you perform arithmetic operations on variables?

add(num1, num2)

$[num1 + num2]

$((num1 + num2))

$(num1 + num2)

2 / 10

What is the purpose of the 'pgrep' command in a shell script?

Searches for processes by name

Kills processes

Prints process information

Lists running programs

3 / 10

In a shell script, how do you find the index of an element in an array?

${array[@]/element}

${array[element]}

${array[@]}

${!array[@]}

4 / 10

What is the purpose of the 'eval' command in a shell script?

Evaluates arithmetic expressions

Evaluates shell commands from a string

Evaluates regular expressions

Evaluates command-line arguments

5 / 10

In a shell script, how do you compare two integers for equality?

if [ $num1 -eq $num2 ]; then

if [ num1 == num2 ]; then

if [ $num1 == $num2 ]; then

if [ num1 -eq num2 ]; then

6 / 10

What is the purpose of the 'env' command in a shell script?

Executes a command in a new environment

Creates a new environment variable

Exports variables to subshells

Displays environment variables

7 / 10

Which operator is used for command grouping in a shell script?

${ }

( )

$( )

[ ]

8 / 10

What is the purpose of the 'basename' command in a shell script?

Extracts the directory from a path

Prints the working directory

Deletes a file

Extracts the filename from a path

9 / 10

In a shell script, how do you read input from a file line by line?

for line in file.txt; do

read line from file.txt; do

while read line; do

foreach line in file.txt; do

10 / 10

What is the purpose of the 'trap' command in a shell script?

Catches errors in the script

Sets up actions to be taken when signals are received

Defines user-defined functions

Creates temporary variables

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