Fission theory. Fission Theory-A theory for the origin of the Moon in which the Moon consists of matter that was flung from the primitive Earth because of the Earth 's rapid rotation ...
Method overloading is the example of compile time polymorphism. Method overriding is the example of run time polymorphism. In java, method overloading can't be performed by changing return type of the method only. Return type can be same or different in method overloading.
Overriding is an object-oriented programming feature that enables a child class to provide different implementation for a method that is already defined and/or implemented in its parent class or one of its parent classes.