It is kind of different from the other JAVA certifications, it is still multiple choice, but the answer is not always obvious and real-life experience does help a lot answering questions about architecture. If you have a solid foundation on Design Patterns , EJBS and UMLs, though, you should be able to answer most questions
These are the books I used for the exam :
Sun Certified Enterprise Architect for J2EE by Paul Allen and Joseph Bambara
UML Distilled by Martin Fowler
Design Patterns by Erich Gamma, Richard Helm, Ralph Johnson, John Vlissides
Mastering Enterprise JavaBeans by Ed Roman, Scott Ambler and Tyler Jewell
I also did the mock exams on Javaqueries and checked the notes on the Java ranch, making sure that I looked up on the words I did not know ( Offboard server ? Guarded object ? ) on the net
I was a little tired but I passed with 91/100 . Now on to the second part ...