Variables and Constants Quiz

1. A variable can only store one value at a time.

• True
• False

Which of the following is an example of a constant?

• Hello
• True
• 42
• x

Scenario: Jane is an IT student that needs to calculate the area of a circle. She uses a variable named 'radius' and a constant named 'pi' to represent the mathematical constant pi. 

Can Jane can change the value of 'pi' during processing?

• Yes

• No

What is a variable ?

• A reserved word in a programming language

• A fixed value that never changes

• A storage location with a name that holds a changing value

• A special symbol used in calculations

Which of the following is an example of a valid variable name?

• total-marks

• 2ndStudent

• if

• student_name

What is the main difference between a variable and a constant?

• Variables store numbers, while constants store text

• Variables can change value, while constants remain fixed

• Constants take up more memory than variables

• Variables must be written in uppercase letters

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

• Variable names must begin with a letter or underscore

• Variable names cannot contain spaces

• Variable names can begin with special symbols like @ and #

• Variable names should be meaningful and descriptive

Which component of a problem statement represents the data entered by the user?

• Processing

• Constant

• Output

• Input

Inorder to calculate the area of a rectangle, which of the following is an output variable?

• Multiply

• Area

• Length

• Width

What would be the best variable name for storing a person’s age?

• 
  total

• x

• person age

• none of the above