I passed SCEA 5 Part I with 67%. I did not give any mock tests as I could not find any simulator. I used the following books 1) JavaEE Tutorial from the web site of Sun 2) Mastering EJB by Ed Roman 3) Head First Design Patterns 4) Core JavaServer Faces (2nd Edition) - by David Geary, Cay S. Horstmann 5) Sun Certified Enterprise Architect by Mark Cade 6) Core J2EE design pattern 7) Core J2EE Design Pattern
I felt the exam difficult and the choices were very close. You have to read between the lines in this exam.