Okay, Hogwartsians, let's test your Harry Potter knowledge. This is an HP quiz posted just for fun.Here are the rules:   1. I will post the first question. The first person who gets it right gets to go next. Only one person asking at a time.   2. Questions can be anything HP related: from the books or movies, about the author, production company, publisher, actors, etc.   3. Since the movies diff…