Ryan, did you pass the assessments already then? If so, the interview questions are mainly scenario based, think of times when you have delt with a difficult customer, what did you do, what was the outcome and what could you have done better? Also times when you have had to work under pressure, I was also asked to point out hazards around the station environment, also examples of verbal and written communication. If you post your question on the forum itself you may get more in depth responses!
Best of luck