In this code, the class B extends the class A. The class B overrides the method talk() from the class A. The object b is an instance of the class B. The object a is an instance of the class A. The object a is assigned to the object b. The object a calls the method talk(). The method talk() from the class B is called.

Question

What does the following code :

public class A {
        public void talk() {
            echo "Hello my name is A"
        }
    }

public class B extends A {
        public void talk() {
            echo "Hello my name is B"
        }
    }

B b = new B();
    A a = b;
    a.talk();

Accepted Answer

"Hello my name is B".

Answer

Execution error because the static type of a is A, which does not inherit from B.

Answer

"Hello my name is A".

Answer

Compilation error because of an implicit upcasting.

Question from the Object-oriented programming - Fundamentals test