[Cs3] Questions

[Mikhail Nesterenko]

> Also for question 3, are abstract factories called abstract factories
> because the methods in the base class are left without implementation,
> while in a regular factory they have an implementation in the base class?

There is a single abstract factory that specifies the interface and
abstract product that abstract factory produces.  Several concrete
factories that implement it the interface of the abstract factory and
produce concrete products.

This allows the client to handle collection of products (produced by
concrete factories) uniformly.

Thanks,
--
Mikhail