You'll get a full brief, in enough time to learn all you need to know, before the assessment.
Otherwise, as mentioned, just a generic check-out of basic flying and non-technical skills - you ought to be able to recognise which are under more scrutiny here!
Tech quiz is multi-choice and fairly generic for airline interviews - a moderate amount of basic prep on tech subjects should set you up for the quiz, however there is a technical aspect to the interview so learning the 'questions' beforehand won't help there.
There are no tricks or traps, it may be cliche but the best advice really is valid - just be yourself.