I have 8+ years of experience.
I did'nt buy any of the mock exams.
I just went through the following sites, BM-ONE LEOCRAWFORD MOELHLM
Since i took my Sun Certified Business Component Developer (SCBCD)
It was easy for me to refresh the following sections by
reading the Head First EJB Book.
Section 4: Enterprise JavaBeans Technology.
Section 5: Enterprise JavaBeans Container Model.
Section 9: Messaging.
I read Head First Design Patterns & for the J2EE Design Patterns i referred
the Head First Servlets & JSP for
Section 8: Design Patterns.
For the UML part that it will be easier if you know all the type of
diagrams.I referred to UML Distilled.
Section 1: Concepts.
For all the below mentioned sections.
Section 2: Common Architectures.
Section 3: Legacy Connectivity.
Section 6: Protocols
Section 7: Applicability of J2EE Technology
Section 11: Security
I downloaded the notes from the BM-ONE list of URL.
For me what i suggest is if you want to really try it ,prepare for the
exam and don't step back for any reason
giving reasons like (I will take the next version).
(It is just my suggestion, maybe others may differ, which i dont want to comment).
There is always the PART II & PART III where you can implement the latest
version for the assignment.
Plan, Prepare, Revise and Execute.
All the very best !.