The questions covered all the aspects but in my experience there are no trick questions. The answers of the multiple choices were very obvious in most cases.
EJB QL questions were very simple (got 2 of those drag-n-drop kind of questions in that).
I forgot to mention earlier - definitely go thru the EJB 2.0 specification. It has some subtle points which you may miss reading the book. The softSCBCD simlator helped figure out those fine-tuning points.