There hasn't been much talk about the type of questions expected. I assume the questions deal with performance, availability, maintenance, manageability, etc... but can somebody provide with any general advice on how to prepare?
John Lincoln wrote:If a question pops up in the exam, can i [talk about what the Cade solution mentions] even though i did not use it the design ?
Remember that part 3 is designed to prove that you were the person who submitted your assignment. As such, if they ask you whether you used a FizzBob and you say yes even though you did not use it, then they are likely to conclude that you do not know what is in your submission and they are likely to fail you.
Talking about what is in the Cade book has a potential to backfire. I wouldn't do it.
I agree with Andrew that you shouldn't deviate from your design. That doesn't stop you being forward looking though. You could say something like "while I don't believe caching is necessary in my design because I used X, I would consider using it if more tuning was needed." And good luck!