My two cents:
I cleared the SCBCD exam with 87% today and my personal thoughts are that one should go after EJB
specs and no other books. The questions in the real exam seems to have got little better than the Beta. The drag and drop problem (out of system resources problem) still occurs so make sure that you are using a good computer when taking the exam. I couldn't attend 5 drag and drop questions that was the reason i couldn't score enough so ensure that you guys don't end up working on the exam over and over again. There is no way in which drag and drop problem can fixed while you are taking the exam. The chances are high that u will have start again from the very first question again.
About the questions: I don't think there is any question that can be called TOUGH. But to my surprise i saw questions that had some links to the 'Support and Interoperability' chapter in EJB spec. The questions were OK OK, none of the questions were tricky. I don't have alot
of experience in EJB but yes i have coded a few hundred EJBs till date, still i found the exam that doesn't require any coding knowledge. Coding will give you better understanding of the EJBs but i don't think that it is required at all.
About preparing for the exam: For those who don't have any previous EJB experience can start with J2EE 1.3 tutorial, in this tutorial earlier in the beginning itself it explains about all the enterprise beans, coding and running enterprise beans, enterprise bean's features which will help you to get big picture of EJBs and after that you can jump on the EJB 2.0 specs.
Time required for preparation: I guess one month will be enough to score good in the exam. I mean even if you start reading what EJBs are from today, the you can comfortably clear the exam in one month.
Exam Simulators: No comments. I don't have any experience of exam simulators. But may be this time i will get an opportunity to use have a look on simulators from SoftLearn Systems and Whizlabs ;-)
(part i),ibm certified solution developer - xml & related technologies