Variables

Which of the following is NOT a characteristic of variables?

• They can be modified during program execution
• They act as placeholders for data
• They are immutable
• They can hold different types of data

Which of the following is an example of a character variable?

• Python
• A
• 25
• age

What determines the range of values a variable can hold?

• The variable's type
• The variable's initial value
• The variable's memory address
• The variable's name

What is the purpose of variables in computer science?

• To act as placeholders for code
• To store and manipulate data
• To make code more readable
• To reserve memory for code

In which programming language must variables be initialized before use?

• Python
• Java
• C++
• All of the above

What is the purpose of following naming conventions for variables?

• To enhance code readability and maintainability
• To make code more secure
• To make code more efficient
• To reserve memory for code

What is the first character of a variable name NOT allowed to be?

• An underscore
• A digit
• A letter
• A special character

Which of the following is an example of a boolean variable type?

• double
• char
• boolean
• int

Which of the following is NOT a rule for naming variables?

• Variable names can consist of letters, digits, and underscores
• Variable names should be as short as possible
• The first character of a variable name cannot be a digit
• Variable names are case-sensitive

What is the purpose of declaring a variable?

• To make the variable immutable
• To reserve memory for the variable
• To make the variable more readable
• To assign an initial value to the variable