Core Java Quiz-1

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

• int

• double

• String

• char

How many bytes are used to store a double data type in Java?

• 4

• 8

• 16

•  It varies depending on the value

What is the default value of a boolean variable in Java?

• True

• False

• 0

• Null

Which data type is used to store a single character in Java?

• char

• int

• byte

• String

What is the range of the byte data type in Java?

•  -128 to 127

• 0 to 255

•  -32,768 to 32,767

• -2,147,483,648 to 2,147,483,647

What is the data type of the literal "3.14" in Java?

• 
  
  float

  
  

• double

• int

• long

Which keyword is used to declare a non-primitive data type in Java?

• void

• class

• new

• non-primitive

What is the difference between a primitive and a non-primitive data type?

• 
  Primitive data types can hold multiple values, while non-primitive data types can only hold a single value.

• Primitive data types are immutable, while non-primitive data types are mutable.

• 
  Primitive data types are predefined in Java, while non-primitive data types are created by the programmer.

• Primitive data types are used for numeric values, while non-primitive data types are used for non-numeric values.

Which data type is used to store a true/false value in Java?

• boolean

• int

• byte

• float

What is the default value of an object reference (non-primitive variable) if it is not explicitly initialized?

• 0

• Null

• False

•  It depends on the variable type.