Below are my scores
1.Design/Build reusable enterprise component 15%/87%
2.Design/Build web components .... 19%/70%
3.Develop clients that access enterprise com 8%/50%
4.Demo understanding of DB conectivity ... 4%/50%
5.Handle EJB Transaction issues 11%/83%
6.Develop J2EE components with WSAD 15%/62%
7.Assemble enterprise app and deploy ... 13%/71%
8.Use WAS tools to validate ............. 15%/62%
I am currently using Weblogic in my projects. I have taken SCJP and 486(OOAD) AND 483(Enterprise Connectibity) last year , and I feel this exam 158 is more difficult than 483.
I spent one month to prepare this exam (3 weekends and at night) :
1) ejb-2_0-spec - this book is valuable in EJBs and transation section, and is the base of other section; I spend more than half time to read this book
2) servlet-2_3-spec - this book is valuable in web section
3) jsp-1_2-spec - this book is valuable in web section
4) sg246144-EJB development with Visual Age for JAVA - this book is valuable in WSAD section
5) sg246176-WebSphere hand book 15,16,18,19,21 - this book is valuable in WAS section
6) I didn't try any test Exam.
Good luck !