Thanks a lot for the wishes.
And also thanks to everybody in the Certification forum for helping me getting confidence quickly through question/answer , dicussion, doubt clearing. This site is really very useful for preparation.
Bert, about the GC I have no idea why I got 66% since the questions were very very basic and simple. Still now I am sure that I have done 100% correct if not my eyes ditched myself while reading them. I was expecting some answers to go wrong in Threads as they were quite tough and toughful. But I got 100% there.
About the Collection classes Dan is right. Kathy's book is perferctly enough for this.
For Math class's methods(mentioned in the objectives), it is better to know the boundary condition(specail cases) return values which you will get in API. That is my feeling after going through the Dan's topic exams.
For String and StringBuffer you need to know the very common methods and whatever you come across in the different mock exams to be well prepared. But the most inmportant thing here is to know when it is returning/pointing to the new string and when it is not. So you have to know the methods keeping the string immutability in mind .
One more tips is be very very clear about threads. As I mentioned before the questions are tough here.This chapter is very good in Kathy's book in describing the basics. Only thing missing there is Daemon
thread and related methods in Thread class.
Thank you once again,
Ambapali