Hi Vish,
Try some mock exams and you will know where you stand. I have used Enthuware and it was really a great learning tool. If you get 70+ in Enthuware mocks, you will definitely get an excellent score in the real exam.
Make sure you covered transactions and security pretty well. You will get a lot of questions in these two. Take a look at the EJB3 specs where it covers these topics. Also skim through the JPA specs.
Good luck
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