I would like to say "thank you" for Dan's wonderful Mock Exam. With his site, I managed to prepare Java in 1 month and did it. I highly recommend this site to anyone who is preparing for SCJP 1.4 exam. Thanks for Kathy's Mock (sent out prior to her new book) as well. JavaRanch is a great place to get moral and technical support. Happy Holidays! Emiko p.s. Study well on GC and Thread.