The UML questions are simple. They may reward you for experience in the
java arena. IMO one of Sun's goals is to enable employers to pick out the experienced.
It has been said in this forum that SCEA is a mile ( kilometer ) wide and an inch ( centimeter ) deep.
Spend your time on EJBs, that's where the most questions are. That is if your goal is to pass part I. Part II could reward you for using and identifying patterns. Part II could reward you being adept at creating superior UML drawings.