Has some handy charts and some important notes. We can test ourselves on this. This Sample Test, has questions on Java Fundamentals. For each question , the answer as well as explanation are given. Recently put up on the net.
Questions are good .
I did not get a chance to use his application since it was not available at the time when I was preparing for the exam. This is not a must to take for the SCJP2 felt by many people. BrainBench offers their own Java Certification and their objectives are little different from Sun's. So you may get some questions which are not needed for Sun's SCJP exam. However,we can use this as a learning tool.