Question

Java Question

abstract class A {

public void templateMethod() {

operation1 ();

operation3 ();

}

abstract public void operation1 ();

public void operation3() {

System.out.print("A-op3");

}

}

Class B extends A {

public void operation1() {

System.out.print("B-op1");

}

}

1.What is the output of:

B b1 = new B();

b1.operation1();

2.What is the output of:
A b1 = new B ();

a1.operation() ;

3.What is the output of :

A b1 = new B();

a1.templateMethod();

Answer 1

1)

Output:

___________________________________________________________________________________

2)

As given in question that object initiation with b1 and calling method with a1, by that it throws error (as a1 not found)

So, if u use b1 then output is

_______________________________________________________________________________________

3)

As given in question that object initiation with b1 and calling method with a1, by that it throws error (as a1 not found)

So, if u use b1 then output is

________________________________________________________________________________________