1.What is the difference between: A x = new A();and A x = new B();
The difference is that in the first case, you are instantiating a class of type A. So you will only be able to call methods defined in A. IN the second case, if the same name method exists in both A and B, then the B implementation will be invoked at runtime.
However, in the second case, using reflection, it will also be possible to invoke methods that are defined in Class B and not in Class A.
A x = new B();
(A)x.run_function();Let's say that both A and B have
the function run_function, which one will be executed ?
Remember - Overriding is decided at runtime whereas overloading is decided at compile time.
So the method in class B will be invoked at runtime based on Dynamic Binding.
