I have been studying during the last 5 months and i have used this material:
SUN Course FJ-310: Developing Applications for the Java EE Platform
SUN Course SL-425: Developing Architectures for Enterprise Java Applications
SUN Course SL-500: Java EE Patterns Sun Certified Enterprise Architecture for J2EE Technology Study Guide - by Mark Cade, Simon Roberts
EJB3 In Action
J2EE Tutorial for Web Services and JSF
Do you think that with this material i am ready for part 1? What material do you suggest to complement my preparation? I want to know specially if i have prepared suficiently security and web services.
I suggest you to test your knowledge and weak points with some mock exam (like Whizlab or Sun's one).
It really helps me to evaluate my preparation and give me confidence.
Note: it seems that the mock exams currently available are simpler than the real exam.
Sometimes, it's time to take the plunge. I know so many people who over-prepare and never actually write. I always say it's better to take the exam too early, maybe not get the mark you want, but know where you need improvement, as opposed to study month after month when you could have already passed the exam and have been concentrating on the next couple of phases.