Hey Melbourne,
I attended the interview process recently in Melbourne and made it through the entire day.
The questions they ask common sense questions and everybody seemed to get asked different questions. In general they have a hypothetic question on how you would deal with a situation if you were cabin crew. Also a question on how you have dealt with a difficult / challenging situation in your current role.
That's about it really. If you answer honestly then you will always be fine. The questions are not hard nor are they a trick, they just want to see how you would / have reacted to different situations.
Hope this helps you.
Take care
Tanya