Java Primitive Unit 1-A

Which of the following is a proper way to declare and initialize a variable in Java? Assuming the variable name is num and the value is 100.

Which explains what the final keyword's purpose is in Java?

• The final keyword is used to restrict the user from overriding/modifying a variable more than once.

• The final keyword is used to define a constant variable and makes it possible for a variable to be changed.

• The final keyword is used to prevent a variable from being overridden/modified.

• All answer choices.

Which explains the best practice for naming a variable in Java?

• Using special characters and spaces
• Using only capital letters
• Using the name of the method
• Using lowerCamelCase notation

How many primitive types are there in Java?

• 5
• 6
• 7
• 8

Check all of the primitive types.

• char

• int

• String

• object

• boolean

Check all of the primitive types.

• byte

• short

• long

• float

• double

In Java, the = sign in a statement means

• is equal to.

• the left hand side is equal to the right hand side in the equation.

• an assignment of the right hand side value to the left hand side variable.

• that two equivalent relationships can be compared using a Boolean comparison.

Which indicates the data type?

Organize these options into the right categories

Groups:

(a) Primitive Data Type

,

(b) Reference Data Type

• int

• double

• short

• class

• char

• long

• boolean

• String

• byte

• float

Which explains what happens when this line of code is executed?

boolean numApples = 5;

• syntax error

• numApples is assigned the value 5

• incompatible types error

• numApples is being casted to an int