Bash Shell Scripting - Other Shell Variables - Part 1

Bash Shell Scripting - Other Shell Variables - Part 1

Assessment

Interactive Video

Information Technology (IT), Architecture

University

Practice Problem

Hard

Created by

Wayground Content

FREE Resource

The video tutorial covers special variables in shell scripting, focusing on $#, $?, $$, and $!. It explains how $# shows the number of arguments, $? provides the exit status of the last command, $$ gives the process ID of the current shell, and $! returns the process ID of the last background process. The tutorial includes examples and explanations to illustrate these concepts.

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7 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does the dollar sign hash ($#) represent in shell scripting?

The exit status of the last command

The process ID of the current shell

The total number of arguments passed to a script

The process ID of the last background process

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does a zero exit status indicate when using the dollar sign question mark ($?)?

The command was not found

The command failed

The command was successful

The command is still running

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If a command returns an exit status of 127, what does it mean?

The command was successful

The command was not found

The command is still running

The command failed due to a syntax error

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does the dollar dollar sign ($$) provide in a shell script?

The process ID of the current shell

The process ID of the last background process

The total number of arguments passed to a script

The exit status of the last command

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why does the process ID change each time a script is run?

Because the script is executed in a subshell

Because the script is executed in a different directory

Because the script is executed in the main shell

Because the script is executed in a virtual environment

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does the dollar sign exclamation mark ($!) provide?

The process ID of the last background process

The total number of arguments passed to a script

The exit status of the last command

The process ID of the current shell

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the context of shell scripting, what is the purpose of running a script with an ampersand (&) at the end?

To run the script in the foreground

To run the script in a different shell

To run the script in the background

To run the script with elevated privileges

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