Linux+ Linux+ Basic Bash Scripting 2

Question 1

Which operator is used to append output to an existing file in Bash?

Accepted Answer

>>

Answer

The >> operator appends output to a file without overwriting its existing contents.

Question 2

What does the special variable $? represent in Bash?

Accepted Answer

The exit status of the last command

Answer

$? holds the exit status of the most recently executed command, where 0 typically means success.

Question 3

Given the script: `for i in {1..5}; do echo $i; done`, what is the output?

Accepted Answer

Prints 1 through 5 each on a new line

Answer

Brace expansion {1..5} generates the sequence 1 2 3 4 5, so the loop prints each number on its own line.

Question 4

Which command inside a Bash function returns a value to the caller?

Accepted Answer

return

Answer

The return statement exits a function and sets its exit status code, which the caller can read via $?.

Question 5

What is the purpose of the `read` command in a Bash script?

Accepted Answer

Reads a line of input from stdin into a variable

Answer

The read command pauses execution and stores a line of user input (or piped input) into one or more variables.

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