tough, tough, tough...classic Goljan questions (I see a few repeats on Pathology tests every once in a while).
I would be a little wary of the dated quality of these questions (pub. 1997) but the science is still good. Some of the really new science may not be up-to-date. Overall, the hardest, most comprehensive review available. A great interface also.
btw, the book questions and the CD questions are identical.