We have started to use Oracle at work, which means that I have to study it and take some exams. Oracle is offering quite a lot of exams as part of its certification program. They are all multiple choice computer-delivered tests, which is nice because you get immediate feedback and detailed analysis (and it is available in many languages). The first test (Introduction to Oracle9i: SQL) can even be taken online, which I did just now. It was not very difficult or Oracle-specific, so knowledge gained from database lectures at university carried me through. The next exams will require more preparation and hands-on experience with Oracle tools. My answer is bring them on.