chanch72,
I strongly recommend you become familiar with the contents of "Basic Aeronautical Knowledge". Provided you can learn effectively, this book alone should be enough to cover your technical needs for the interview. As long as you have a clear mind and a basic sense of logic, BAK should not be a problem at all.
Lastly don't forget to brush up on CX company information, as well as details on the cadet program itself.
Good luck!