I cleared SCBCD with 97% today. Thanks to Kathy and Bert for the wonderful book HFEJB and everybody on this group for answering questions.
I referred Headfirst EJB
by Kathy Sierra and Bert Bates, Mastering EJB 2 by Ed Roman and used EJB specifications as reference when required.
I solved all mock questions in HFEJB and free mock exams available on EJBCertificate.com.