Oracle Certified Associate, Java SE 5/SE 6
Oracle Certified Associate, Java SE 7 Programmer
I don't know which one to pick. The existing applications are written with no special framework and utilize sessions. What kinds of questions would I need to ask the existing programmer to determine which one of these courses I should take, if not both of them? For instance, would I need to ask the existing programmer what JRE/JDK he was utilizing, would this help me to determine which one to obtain? Or are there other types of questions which I would need to ask?
If you are hired as a java programmer/developer, you must take the OCAJP7 (Oracle Certified Associate, Java SE 7 Programmer) exam. That's the only one (of your list) which addresses java programmers/developers, the other one (OCAJ 5/6) is more suited for project and program managers.