Besides cpandya14's questions, be prepared for:
If no MBA, then what?
If unable to get into your desired job after MBA, then which path, what route?
Stick to some plan for these two questions. Rest is what cpandya14 said, generic and pretty straightforward.
And the current students were really amazing, they came to talk when I was waiting for the interview and reassured me (I was nervous).
It was an open day too, so met other applicants. And lastly, don't forget to take your transcripts with you, and if you are planning for other schools in later rounds where a certified copy is required(if an official transcript is unavailable), now is the time, you might be asked to submit your original transcript to the school.
Good luck!!