When anybody starts asking you about technologies or anything tech-related it’s probably easier just answer that it’s not within your competences. But… using this approach you can lose some good candidates. Out there are a lot of similar technologies. Your client can ask to find someone with experience in Hibernate. Hibernate is just an implementation of JPA so you can check every candidate that have JPA in CV. Knowledge about these relations can boost your productivity. Lets be more aware of Java world!