I've passed SCBCD today with 90% in exactly 1 hour. If I had checked my 5-6 marked questions, maybe the result would be a little better, but I was sure I would pass the
test.
The test is really not hard - there are no detailed questions from API (method arguments, return types etc.) like in
SCJP.
You must *understand* beans' lifecycle (callback methods), transaction mechanism (only 6 transaction attributes) and exceptions (not hard, just
think on which layer it is and if it is remote or local). It is necessary to *learn* by heart not so many methods' definitions from only 5-6
interfaces (be sure to know the difference between local/remote int, user transaction and contexts interfaces), and a few snipets from diployment
descriptor related to security, transactions and references. There are 2 or 3 very simple EJB-QL questions. Just pay special attention if a
question is related to stateless or statefull bean, and CMT or BMT.
I worked with
EJB 2.x a few years ago (reading EJB 3rd Edition, O'Reilly), and my reference for the test was the book: Head First SCBCD (O'Reilly). Very good book, but with a few such big mistakes that you can't miss them.
I read it twice.