Wow!!! That's a great score. Congratulations. If you don't mind telling, what was the very tricky question about? What would one need to study to answer it? This will really help other test takers. (No need to disclose the actual question )
Tricky question wasn`t tricky because of the knowledge you should have to answer it. It was tricky, because many "integer" calculations was needed to answer it - I`ve spent 30min on it and I`ve given up finally.
What are my tips for test takers? I can only tell how I was prepearing.
1) I`ve read K&B Study Guide 1.5 very carefully. I`ve often used pencil to underline important parts and to make notices like: "!!! Remember it", "!!! That`s clue" and so on. Then, after having read each chapter (and just before the exam) I was moving back to remind these important parts.
I`m sure, it`s no use to study other materials, because all what is needed on the exam is in this study guide (Ok, maybe without the fact, that "System.out.printf("%b %b",342376,"xcjkk"); gives "true true" and that Locale.getDefault() method exists)
2) I`ve taken some (five) mock exams to feel better
Mock exams at the end of each chapter were much more difficult, than on the exam. I`ve taken them just after having read each chapter and I scored between 50% and 90% spending even 2 hours for 14 questions (because these tests were really hard).
Then, but not until having read the whole book, I have tried Whizlabs tests (4 of 6 available full 72-question tests). I`ve scored: 85%, 75%, 72%, 80%. But I`ve noticed that many API features in these questions weren`t mentioned in the K&B guide... and didn`t occured on the exam. So, don`t panic when you see new things in Whizlabs, probably they`ll not be present on the exam.
Finally, the day before the exam, I`ve taken "Learn Key Master Exam" attached to the book scoring with 78% (Bert, I`ve found a few incorrect "correct answers" there ... and I don`t mean little mistakes)
3) During the exam, I`ve read each question and each peace of code very carefully (to be sure, that class, main method, constructors and so on.. is declared correctly). Only after that I was thinking about actual problem.
I`m sure, that what I`ve described above is enough to have 100% correct answers. Really!
I wish all You good luck and satisfaction of being sun certified