I havent read any red books, or using any mock exams.
I solely used the following books for IBM 287 and IBM 484: 1. Head First EJB 2. SCWCD Exam Study Kit, 1st edition 3. Developing J2EE applications using WSAD v5.0 4. Various tutorials on JDBC, JNDI, JMS, JAAS, JCA, etc.