java 3

What is the output of the following java program?

public class Outer 

{

    public static int temp1 = 1;

    private static int temp2 = 2;

    public int temp3 = 3;

    private int temp4 = 4;

      

    public static class Inner

    {

        private static int temp5 = 5;

          

        private static int getSum()

        {

            return (temp1 + temp2 + temp3 + temp4 + temp5);

        }

    }

      

    public static void main(String[] args)

    {

        Outer.Inner obj = new Outer.Inner();

        System.out.println(obj.getSum());

    }

      

}

• 15

• 9

• 5

• compile error

// Main.java

public class Main

{

    public static void main(String args[])

    {

        short s = 0;

        int x = 07;

        int y = 08;

        int z = 112345;

  

        s += z;

        System.out.println("" + x + y + s);

    }

}

find out the error??

• Compile Error at line 8

• Compile Error at line 6

• Compile Error at line 4

• Compile Error at line 5

// Main.java

public class Main

{

public static void gfg(String s)

{

System.out.println("String");

}

public static void gfg(Object o)

{

System.out.println("Object");

}

public static void gfg(Integer i)

{

System.out.println("Integer");

}

public static void main(String args[])

{

gfg(null);

}

}

find the error???

• Compile Error at line 19

• Compile Error at line 15

• Compile Error at line 12

• Compile Error at line 09

class ThreadEx extends Thread

{

    public void run()

    {

        System.out.print("Hello...");

    }

    public static void main(String args[])

    {

        ThreadEx T1 = new ThreadEx();

        T1.start();

        T1.stop();

        T1.start();

    }

}

find the type of error??

• compile time

• run time

• no error

• executes

public class Test

{

private int data = 5;

public int getData()

{

return this.data;

}

public int getData(int value)

{

return (data+1);

}

public int getData(int... value)

{

return (data+2);

}

public static void main(String[] args)

{

Test temp = new Test();

System.out.println(temp.getData(7, 8, 12));

}

}

find the output of the code???

• 7

• runtime error

• compile time error

• 9

interface OuterInterface

{

public void InnerMethod();

public interface InnerInterface

{

public void InnerMethod();

}

}

public class Outer implements OuterInterface.InnerInterface, OuterInterface

{

public void InnerMethod()

{

System.out.println(100);

}

public static void main(String[] args)

{

Outer obj = new Outer();

obj.InnerMethod();

}

}

find the code outcome??

• compile time

• runtime

• 100

• none

public class MyStuff

{

String name;

MyStuff(String n) { name = n; }

public static void main(String[] args)

{

MyStuff m1 = new MyStuff("guitar");

MyStuff m2 = new MyStuff("tv");

System.out.println(m2.equals(m1));

}

@Override

public boolean equals(Object obj)

{

MyStuff m = (MyStuff) obj;

if (m.name != null) { return true; }

return false;

}

}

find the outcome of the code??

• The output is true and MyStuff fulfills the Object.equals() contract.

• The output is false and MyStuff fulfills the Object.equals() contract.

• The output is true and MyStuff does NOT fulfill the Object.equals() contract

• The output is false and MyStuff does NOT fulfill the Object.equals()

class Alpha

{

public String type = "a ";

public Alpha() { System.out.print("alpha "); }

}

public class Beta extends Alpha

{

public Beta() { System.out.print("beta "); }

void go()

{

type = "b ";

System.out.print(this.type + super.type);

}

public static void main(String[] args)

{

new Beta().go();

}

}

find the out put of the code??

• alpha beta b b

• alpha beta a b

• beta alpha b b

• beta alpha b a

public class Test

{

private static int value = 20;

public int s = 15;

public static int temp = 10;

public static class Nested

{

private void display()

{

System.out.println(temp + s + value);

}

}

public static void main(String args[])

{

Test.Nested inner = new Test.Nested();

inner.display();

}

}

find the output??

• compile error

• 101520

• 1020

• none

import java.io.*;

public class Test

{

public void display() throws IOException

{

System.out.println("Test");

}

}

class Derived extends Test

{

public void display() throws IOException

{

System.out.println("Derived");

}

public static void main(String[] args) throws IOException

{

Derived object = new Derived();

object.display();

}

}

out put of the code??

• Test

• Derived

• Runtime error

• Compilation error