I cleared IBM Portal 399 exam today with 80% marks. I know this is not a great score, but I would take it because I did not have any experience in portal development/RAD etc. I spend 3 weeks preparing for this exam and around 2-3 hours daily.
Let me first thank Java Ranch for helping me in clearing this exam and also Cameron Mckenzie. Cameron has put a great site for portal and his tutorials on portal concept are great. I would strongly suggest every one, who does not have RAD hands on experience, to go through his video tutorials and then take the mock tests.
I downloaded portlet-1_0-prd-javadoc.zip from the internet and went through the methods for each interface. Also i read the portlet-1_0-fr-spec.pdf.
sg246681.pdf you need to read for Cooperative portlets, Portlet Services, Credential vaults, Struts and JSF portlets, Skin and Themes, and some of the installation concepts. I am not sure why its not mentioned in the study material by IBM
The way i approached my preparation is this. 1. Read thoroughly JSR 168 Spec. 2. Once I underdstood the concepts of JSR 168 Interfaces/classes, then I read through the methods provided by each of these interface. 3. Read only the chapters i mentioned in my earlier post from sg246681.pdf. You can skip the chapters for JSR 168 because you are already reading portlet-1_0-fr-spec.pdf. 4. As i didn't have any portlet and RAD experience, i went through Camron Mackenize website and saw/understood video tutorials. 5. At last did mock tests from Camron's site.
Good luck Puneet
PMP, IBM Certified Solution Designer(OOAD), IBM Certified Solution Developer (Websphere Portal V5.1), SCEA (Only Part I), SCBCD, SCJP1.4, Brain Bench: J2EE 1.4, Brain Bench:Java 2