I just got my
SCJA certification and here is my advice:
Study hard!
You need to have in-depth knowledge of
EJB's,
Servlets,
Patterns, UML and connectivity to legacy systems.
Do not take this exam (all 3 parts) lightly because it is intended for more seasoned developers with solid experience in
Java and Object-Oriented principles.
In the end you will be proud of your accomplishment and you will be rewarded by having a very prestigious certification.
Good luck to all of you.