Question

When the parent class have an add method with 2 parameters, If we add new add method with 3 parameters in child class, shall we call this as over loading?

Thanks in advance.

Answer 1

Yes, since the method with two parameters is inherited by the subclass, the method with three parameters is said to be an overloading method.

class A
    add(param1, param2)

class B
    add(param1, param2)            <-- inherited
    add(param1, param2, param3)    <-- overloading the above method

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A quote from the official trail on Overriding and Hiding Methods:

Note: In a subclass, you can overload the methods inherited from the superclass. Such overloaded methods neither hide nor override the superclass methods—they are new methods, unique to the subclass.

(As you probably already figured out, the method with three classes is not an overriding method.)