Dear
In part I of
SCEA 2 you had to show principles knowledges of UML, and Legacy connectivity. I believe that still there are questions about these items in SCEA 5. But in part II, you must use UML to do the project.
I think that if you are studying to exam, you must know about all.
You can see the objectives of part I in:
Sun site - SCEA
Andrew Thomas Betencourt<br />SCJP, SCJA, SCWCD, SCBCD, SCEA 2<br />Fujitsu Brazil