Linux Scripting with Bash

Test your ability to automate tasks using shell scripts and variables.

1. What is the standard shebang line to specify a Bash script?

#!/bin/bash #!/bash #!/bin/sh #!bash

2. Which is the correct way to assign a value to a variable in Bash (no spaces)?

name = "John" name="John" set name "John" name := "John"

3. Which loop runs as long as a condition is true?

for until while do-while

4. What does $? represent in Bash?

Number of arguments Exit status of last command Current script name Home directory

5. Which syntax captures command output into a variable?

$(command) {command} <command> !command

6. Which operator checks if a file is a regular file?

-d -f -e -x

7. What terminates a case statement?

end esac done fi

8. How to declare an array in Bash?

arr = (1 2 3) array arr=(1 2 3) arr=(1 2 3) set arr = (1 2 3)

9. What exit status indicates command success?

0 1 255 -1

10. Which variable holds the script name?

$1 $0 $# $@

11. Valid Bash loop structures:

for while do-while until

12. Check if a file exists:

[ -e "file.txt" ] test -e "file.txt" [[ -e "file.txt" ]] exists "file.txt"

13. Reference command-line arguments:

$1 $@ $* $#

14. Valid conditional constructs:

if...then...fi switch...case...end case...esac select...in...do...done

15. Bash functions must be defined before use.

True False

16. 'break' exits the entire script.

True False

17. Backticks (`) work for command substitution like $(...).

True False

18. Command to read user input into a variable (no options):

19. Symbol to start a comment line (single character):

20. Variable with all arguments as separate elements:

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