Counting script arguments | LinuC Level 1 102 Exam original practice question

1.06.2Basic

Run ./deploy.sh blue west.

Retrieve the number of positional arguments, which is 2.

Which special parameter is appropriate?

Hint 1: Focus on the input model

Separate word-list iteration, condition-controlled loops, field splitting, and literal input handling before comparing the choices.

Hint 2: Key terms

Review the short definitions of the shell syntax, parameters, permissions, and control flow involved.

$#: The number of positional parameters in the current context.
$0: The name used to invoke the shell or script.
$?: The exit status of the most recently completed command.
$$: The process ID of the current shell.
Positional parameter: A special parameter holding a script or function argument by position.

Detailed explanation

Incorrect$0

Incorrect. $0 is the script name.

Incorrect$?

Incorrect. $? is the previous command's exit status.

Correct$#

Correct. $# is 2 for blue and west.

Incorrect$$

Incorrect. $$ is the shell process ID.

An example you can run in a temporary verification environment.

sh -c 'printf "%s\n" "$#"' deploy.sh blue west

Foundation review

A reusable group of commands that runs in the caller's shell context.

A numbered argument or special value supplied to a script or function.

Conditions, loops, and exit statuses determine which shell commands run.

Question IDKL-102-931

EnvironmentPOSIX sh / 短命プロセス

Last technical review2026-08-13

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