Linux+ Linux+ Bash Scripting and Automation 2

Question 1

Which construct is used to iterate over each line of a file in a Bash script?

Accepted Answer

while IFS= read -r line; do ... done < file.txt

Answer

for line in $(cat file.txt)

Answer

while IFS= read -r line < file.txt

Answer

foreach line in file.txt

Question 2

What does the special variable $? represent in a Bash script?

Accepted Answer

The exit status of the last executed command

Answer

The process ID of the current script

Answer

The total number of arguments passed

Answer

The name of the current script

Question 3

Which Bash operator sends standard error to the same destination as standard output?

Accepted Answer

2>&1

Answer

1>&2

Answer

&>2

Answer

>>2

Question 4

In a Bash case statement, what symbol marks the end of each pattern block?

Accepted Answer

;;

Answer

break

Answer

end

Answer

esac

Question 5

What is the purpose of the 'local' keyword inside a Bash function?

Accepted Answer

It declares a variable scoped only to that function

Answer

It imports a variable from the parent shell

Answer

It marks a variable as read-only

Answer

It exports the variable to child processes

Question 6

Which command substitution syntax is preferred in modern Bash scripts over backticks?

Accepted Answer

$(cmd)

Answer

${cmd}

Answer

`cmd`

Answer

[[cmd]]

Question 7

What does 'set -e' do at the top of a Bash script?

Accepted Answer

Causes the script to exit immediately on any command error

Answer

Enables extended globbing patterns

Answer

Echoes every command before executing it

Answer

Enables strict variable checking