>No one’s going to give you a bonus for remembering the difference between inheritance and polymorphism: let’s face it, you’d take the 5 seconds to Google the definitions and move on.

The point of those questions isn't to test whether you know the definitions of polymorphism and inheritance. The point is to test whether you understand the concepts. Anyone can regurgitate the textbook definition, but can anyone explain why polymorphism should sometimes be avoided? Not if they haven't invested some time in understanding both the theory and applications of OO principles.