Java Question abstract class A { public void templateMethod() { operation1 (); operation3 (); } abstract public void operation1 (); public void operation3() { System.out.print("A-op3"); } } Class B...

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();