(Q) How a prototype pattern can be used to eliminate parallel creator class hierachies?. Can anybody explain this with an example.

(Q) In GOF book, Command pattern is defined as follows.
Encapsulate a request as a object. This allows you to parameterize clients with different request.

I think it should be encapsulate request handler as a object because a command object is a request handler.

Please let me know in case i am wrong.