Hi Prasad,
I wrote the exam some 3 months ago, and as far as i can remember, I did not get even a single question from deployment descriptors.
However, while preparation, I also roughly read the stuff related to deployment descriptors, just to get a feel of the relationships and the syntax.
Personally I dont think there is much emphasis on learning about all the aspects of the deployment descriptors. Annotations are in, and i suppose we need to primarily focus on learning to write
EJB's using annoations, at least for the current version of the cert.
Regards,
Ryan Sukale