What is a variable?

• A fixed value in a program

• A storage location identified for data that can change

• A type of hardware component

• A constant in mathematics

What does an environment variable provide?

• Hardware specifications

• Network configurations

• Settings and configurations

• User interface design

What is a shell variable?

• A variable inherited by child shells and processes

• A variable that is not inherited by child shells and processes

• A variable used in web development

• A variable that stores user passwords

What is a local variable?

• A variable that is always available

• A variable defined in scripts and script functions

• A variable used for network settings

• A variable that stores system logs

What does the HISTSIZE variable determine?

• The size of the user's home directory

• The number of lines or commands stored in a history list

• The number of active users

• The size of the system memory

What does OLDPWD represent?

• The current working directory

• The previous directory the user accessed

• The user's password

• The user's email address

What does the HISTFILE variable store?

• User passwords

• Past commands

• User emails

• System logs

Which variable is typically defined in scripts and does not exist after the script is run?

• Environment variable

• Shell variable

• Local variable

• User variable

What does the command `export [name]=[value]` do?

• Deletes an environment variable.

• Creates a new environment variable.

• Lists all environment variables.

• Displays the value of a variable.

How does the command `echo $[name]` function in a shell?

• Deletes a variable.

• Displays the contents of a variable.

• Creates a new variable.

• Lists all variables.