Bash Shell Scripting- Introduction to variables

What command is used to display a message in a shell script?

• SHOW

• PRINT

• DISPLAY

• ECHO

Why is it beneficial to use variables in shell scripts?

• To increase the script size

• To make the script more complex

• To avoid repetition of lengthy messages

• To make the script run faster

What is the default value of an undefined variable in shell scripting?

• 0

• null

• empty or nothing

• undefined

Which type of variables are created and maintained by the operating system?

• System variables

• Local variables

• Temporary variables

• User-defined variables

What is a key characteristic of system variables in Linux?

• They are defined in capital letters

• They are defined in lowercase letters

• They are user-defined

• They have no default value

What characters are allowed in user-defined variable names?

• Any special characters

• Only numbers

• Lowercase, uppercase, numbers, and underscore

• Only lowercase letters

What is the maximum recommended length for a user-defined variable name?

• 15 characters

• 25 characters

• 10 characters

• 20 characters

Why should you avoid using spaces around the equal sign when defining variables?

• It makes the script run slower

• It is not a standard practice

• It causes syntax errors

• It makes the script harder to read

How can you store the output of a command into a variable?

• Using parentheses or backticks

• Using square brackets

• Using curly braces

• Using angle brackets

What should you do if your data contains spaces when defining a variable?

• Use no quotes

• Use double quotes

• Use backticks

• Use single quotes