I need advices on the new oracle certification (Java Platform, Enterprise Edition 6 Java Persistence API Developer Certified Expert).
Have you any suggestions on the books or exams, etc..
Thank in advance.
You should read Pro JPA 2 to understand general ideas behind JPA. ( I have read this book twice and made almost all examples. )
Also It is very important to study specification. There are a lot of question on exam from there.