Thanks all the ranchers here and special thanks to Dan, Valentin, Kathy, Jose...
The exam is much easier than I expected and than the most mock exams I have taken. The worst part I've did is in GC section, I got only 67%.
For me, the code questions are pretty simple, but I spent time on some concept questions (and I might lost the major on these). Be careful that the answers have tiny differences.
So I'd suggest you backup with a solid understand on object-oriented concepts and of course those objectives mentioned in the exam.
I finished all the questions in 1 hr 10 mins, after I go through each question again, I still have 1 minitue left. So don't worry about the time, for sure you read clearly the questions. And checking is very important.
Last suggestion for passing the exam - be active at
Java Ranch