Java Data Types and Variables - MCQ - Quiz

What is size of integer in Java Programming.
  • A 3 Bytes
  • B 4 Bytes
  • C 2 Bytes
  • D 8 Bytes

Which of the following Class is used to wrap boolean value?
  • A None of these
  • B java.lang.Boolean
  • C java.util.Boolean
  • D java.io.Boolean

Which of the following automatic type conversion will be possible?
  • A short to int
  • B byte to int
  • C int to long
  • D long to int

Automatic type conversion in Java takes place when
  • A Two type are compatible and size of destination type is shorter than source type.
  • B Two type are compatible and size of destination type is equal of source type.
  • C Two type are compatible and size of destination type is larger than source type.
  • D All of the above

What will be output of the following program code? 
public class Test{
	public static void main(String[] a){
		short x = 10;
		x = x*5;
		System.out.print(x);
	}  
}

  • A 50
  • B 10
  • C Compilation Error
  • D None of these

Compiler never assigns a default value to an uninitialized local variable in Java Programming !!
  • A True Statement
  • B False Statement

What is the output of the following program? 
class A{
        public static void main(String args[]){
	        byte b;
   	        int i = 258;
	        double d = 325.59;

	        b = (byte) i;
	        System.out.print(b);

	        i = (int) d;
	        System.out.print(i);

                b = (byte) d;
                System.out.print(b);
        }
}

  • A 258 325 325
  • B 258 326 326
  • C 2 325 69
  • D Error

Which of the following is not a primitive data type?
  • A int
  • B short
  • C byte
  • D enum

Default value of String (or any object) in Java Programming is _____________.
  • A 0
  • B false
  • C '\u0000'
  • D null

"Accessing an uninitialized local variable will result in a compile-time error in Java Programming"
  • A False Statement
  • B True Statement