Im studying for the Oracle JPA exam (using Pro JPA 2 book and enthuware mock exams) and i'm just wondering if there will be questions about xml mapping or is it enough to know the annotations? If there is xml mapping will I be required to know everything or is it focused on persistence unit xml and the more global settings?
There may be or may not be questions. you may get 1 or 2 questions from that part. Each part has its own importance. It is safer to cover that part. You'll still have the knowledge in back of your mind just in case it is asked more number of times. It will probably be just persistence unit xml and global settings. enthuware will give you a fair bit of example. So all the best!