What to use? So many choices!
		• Even if you are not using multiple inheritance – Interfaces are preferable to abstract classes which in turn are preferable to concrete classes when thinking about a common base class – As we discussed in C++, if you are doing dynamic binding, it is best if all methods are dynamically bound – otherwise you will get stuck with having to know the data type you are dealing with at run time (RTTI) – An interface ensures that this is the case