JAVA QUESTION class A { public void m() {System.out.println("A"); } } class B extends A{ public void m() {System.out.println("B"); } } class C extends B{ public void m() {System.out.println("C");...

JAVA QUESTION

class A {

public void m() { System.out.println("A"); }

}

class B extends A {

public void m() { System.out.println("B"); }

}

class C extends B {

public void m() { System.out.println("C"); }

}

class D extends B {

public void m() { System.out.println("D"); }

}

class E extends A {

public void m() { System.out.println("E"); }

}

public class ExamQ1 {

public static void main(String[] args) {

A x1 = new C();

C x2 = new C();

...

What is the result of attempting to compile and run the following code fragment?

((D) x1).m();

What is the result of attempting to compile and run the following code fragment?

((D) x2).m();

What is the result of attempting to compile and run the following code fragment?

A x4 = x2;

x4.m();

QUESTION:

C x2 = new C();

A x4 = x2;

so x2 has nature of C but what happens when it gets assigned like that?