Wipro PRP - 7th June 2023

Trace the output.

class A{
    public static void main(String[] args) {
        System.out.print();
    }
}

• Runs without any error, prints nothing

• Error: no suitable method found for print

• 1

• 0

  System.out.println(86>>2);

  System.out.println(-86>>2);

• 21 -22

• 21 -21

• 22 -22

• 22 -21

.Main method is static because to execute main method without creating object By JVM

• Yes

• No

All Interface variables are ___ by default in Java.

• public

• final

• public and final

• any thing is acceptable(private, protected, etc.,)

A Class implementing an Interface can use ____ access modifier before the implemented methods.

• public

• private

• protected

• all are acceptable

Which of these can be used to fully abstract a class from its implementation?

• asbtract

• Interface

• Both abstract and Interface

• none of the above

A Java Interface can not declare constructors. State TRUE or FALSE.

• True

• false

A Java static method can not be ___.

• private or protected

• final

• abstract

• All the above

What will be the output of the following program?

public class Null {
    public static boolean greet() {
        System.out.print("Program execute = ");
        return true;
    }
    public static void main(String[] args) {
        System.out.println(Null.greet());
    }
}

• 
  Program execute = true

• 
  Program execute = false

• Program execute =

• 
  Compilation Error or Runtime Error

class Hello {

static int x = 10;

public static void main(String[] args)

{Hello obj1=new Hello();

obj1.x=20;

Hello obj2=new Hello();

obj2.x=30;

x=40;

System.out.print(obj1.x + " "+obj2.x);

}

}

• 20 30

• 40 40

• 30 30

• 30 40