You'll get proportional numbers of questions on each exam topic so your exam will be balanced by topic the same way as all other people's exams. I don't know how many questions are the in the entire pool from which they take questions. It really doesn't matter. Knowing how many questions are in the entire pool won't help you on the exam in any way. All you need to know is that every exam objective will be covered.
SCJA 1.0 (98%), SCJP 1.4 (98%)
I’ve looked at a lot of different solutions, and in my humble opinion Aspose is the way to go. Here’s the link: http://aspose.com