Java Summer Internship Quiz-9

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

• a) 0

• b) null

• c) false

• d) It depends on the variable type.

Which of the following is a non-primitive data type in Java?

• v

• b) double

• c) float

• d) Integer

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

• a) boolean

• b) int

• d) float

• c) byte

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

• a) void

• b) new

• c) class

• d) non-primitive

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

• • a) float

• • b) double

• • c) int

• • d) long

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

• • a) -128 to 127

• • b) 0 to 255

• • c) -32768 to 32767

• • d) -2147483648 to 2147483647

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

• a) char

• b) int

• c) byte

• d) String

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

• a) true

• b) false

• c) 0

• d) null

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

• a) 4

• b) 8

• c) 16

• d) It varies depending on the value.

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

• a) int

• b) double

• c) String

• d) char