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Define Polymorphism?
A: Polymorphism let a client to treat distinct objects in the similar way even if they were developed from distinct classes and exhibit different behaviors. You can employ implementation inheritance to attain polymorphism in languages like C++ & Java. Base class object's pointer can invoke methods in derived class objects. You can also acquired polymorphism in C++ by operator overloading and function overloading.
how to write
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b) Why copy constructor accepts reference to an object and not the object itself? What happens if we do otherwise?
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