in both, i found dat questions were not direct and were concept based.
so i think u shud go for a refresher!!
X was different. but for XII, u will require an extra book!!
Remember Cedric. Remember, if the time should come when you have to make a choice between what is right and what is easy, remember what happened to a boy who was good, and kind, and brave, because he strayed across the path of Lord Voldemort. Remember Cedric Diggory.
Albus Dumbledore
Goblet of Fire, Chapter 37, Page 724