J277 - 2.2 - Understanding Data Types in Programming

What is a data type?

• A type of computer hardware

• A formal classification of the type of data being stored or manipulated within a program

• A programming language

• A type of software application

Which of the following is an example of an integer?

• 3.14

• -5

• True

• Hello

What is the main characteristic of a real (float) data type?

• It can only store whole numbers

• It can store numbers with decimal places

• It can only store text

• It can only store True or False values

Which of the following is a Boolean value?

• 123

• False

• £

• 12.5

What does the char data type represent?

• A collection of characters

• A single character

• A whole number

• A decimal number

Which of the following is an example of a string?

• 42

• 3.14

• Hello, World!

• True

What does a null value represent?

• A large number

• A small number

• The lack of any value

• A collection of numbers

Which of the following operations can be performed on integer data types?

• Concatenation

• Division

• Logical AND

• Formatting

Which data type would be most appropriate for storing the value "£"?

• Integer

• Real

• Char

• Boolean

If you want to store the text "ninety-four", which data type should you use?

• Integer

• Real

• String

• Boolean