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What is "balanced polymorphism?

What is the polymorphism?

  • This week I'll go to a job interview and there will be questions from OOP. One of the questions will be about polymorphism and I want to give a smart answer. Can you give me some ideeas?

  • Answer:

    Polymorphism is a major tool in OOP. There is no simple way to explain it, but I'll try. In short, polymorphism means that when an objects function or method is called, if that object is actually a child object, the child objects implementation of said function will be called instead. Imagine you have a class called "Animal" which has a function called "talk", which does nothing. Then you have two child classes called "Dog" and "Cat". "Dog" overrides the "talk" function to print out "woof". "Cat" overrides the "talk" function to print out "meow". Let's say you have an array of "Animal" objects which you iterate through, calling "talk" on each one. If any of them are "Dog" objects, instead of doing nothing, it will print out "woof", same with "Cat" objects.

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Check this out : http://en.wikipedia.org/wiki/Polymorphism_(computer_science)

jacknbx2006

Compile time polymorphsim and run-time polymorphism function name overloading we will be having a set of functions with same name but differing in argument/types. When we make a function call, compiler decides which function (with the same) has to be called really during the compilation itself. Even, we can think of template functions also compile time polymorphism. Run-Time polymorphism We know that we can assign derived class address to base class type pointer (even we can reference also not only address). class A { public: void show(){} } class B:public A { } class C:public A { } main() { A *P; B X; P=&X; P->show(); Now show is called with B type of object as P is currently point to B type object. C T; P=&T; P->show(); Now, show is called with C type object as base class pointer to pointing to C type object } That is, when we say P->show(), at that instance to whatever type of object it is pointing with that show is called. This is, run-time polymorphsim Do link with virtual functions also here

James Bond

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