Questions: In addition to the chapter end questions and full-length Mock exams in both the books, I used Enthuware's mock exams, which, certainly, have been very useful.
Exam itself: The time didn't feel like a constraint at all. Esp. compared to the OCPJP7 exam, 3 months ago, when I had used up all the time for the questions themselves and had no time to even review. In this exam, I had, nearly, 1 full hour still left on the clock when I finished the questions. Probably, the reason is there are few real code-based questions, which makes it much easier than OCPJP7 exam too.