G-OP
There are a few of us out here, I tend not to get stuck in with "advice" as it may seem unethical, however I will commend/correct stuff here on PPRUNE.
Odi's first para in the above post is some of the best advice around.
By all means do your background work, but don't think like MCH2000 that you're going to be asked a long list of "technical" questions with right and wrong answers. That's called a test, and doesn't require an interviewer. You're doing an interview, which is a two way thing, an exchange of views in which you don't just sit there and respond to questions, you ask for more info if required, you debate options, and show your ability.
MCH2000, I'm not having a go, I just don't want someone focusing on learning tons of info, and subsequently not "selling" themselves in interview.
Good luck to all those currently in the process.
Regards
Father Jack
"mind the gap"