Variables

What are variables in computer science?

• Storage locations with assigned names that hold data

• Boxes used for packing and labeling

• Data types in programming

• Values that can be changed later on

What determines the type of data a variable can hold?

• The assigned name of the variable

• The value assigned to the variable

• The data type of the variable

• The category of the data

Which of the following is NOT a data type in Java?

• Integer

• Character

• Boolean

• Decimal

What is the first step in creating a variable?

• Assigning a value to the variable

• Declaring the variable's data type

• Naming the variable

• Labeling the box

Why is it important to give variables meaningful names?

• To make the code look more professional

• To confuse other programmers

• To easily identify the use of the variable

• To prevent errors in the program

Mia is learning to code and she wonders if she can declare a variable in her program without assigning a value to it. What would you tell her?

• Yes, Mia. It will be like an empty box waiting to be filled.

• No, Mia. It is mandatory to assign a value when you declare a variable.

• Yes, Mia. But it will cause an error in your program.

• No, Mia. It is not allowed in programming to declare a variable without assigning a value.

What can you do with a variable after declaring it?

• Change its data type

• Change its assigned name

• Change its value

• Change its category

What is the value of the variable 'score' after the following code?

score = 3

• 10

• 3

• 13

• 7

What is the value of the variable 'greeting' after the following code?

greeting = 'Howdy'

• 'Hi'

• 'Howdy'

• 'Hi' and 'Howdy'

• None of the above

What is the value of the variable 'total' after the following code? total = points + 5 points = 3

• 3

• 5

• 8

• 10