Hi Many people have cleared the SCBCD exam, first of all congrats to them, secondly, can anyone of you tell me, Does SCBCD exam for EJB 3.0 includes questions from EJB 2.1 also because while going through the EJB 3 reference guide by sun microsystems, they have explained both EJB 2.1 and EJB 3.0 So I was wandering what to do. Should I read both or EJB 3 only.
2.1 and backwards compatibility is definitely a part of the spec, and it is included as part of the exam objectives:
Identify correct and incorrect statements or examples about EJB 3.0 / EJB 2.x interoperability, including how to adapt an EJB 3.0 bean for use with clients written to the EJB 2.x API and how to access beans written to the EJB 2.x API from beans written to the EJB 3.0 API. -SCBCD Objective
There's no need to dive deep into all aspects of EJB 2.x, but a fundamental understanding of the differences will help you out on a question or two. On the other hand, if you don't know anything about it, you'll probably only miss one or two questions.