If the grad interview is anything to go by, the first round KPMG interview will be with a partner and manager. Questions include why KPMG, why the specific service line, couple of behaviourals and then a scenario question (such as the ones they ask in management consulting). They'll help you get relaxed by starting the interview with a conversation about your hobbies and such.
Numerically your odds of advancing will probably never be good in these kinds of positions, but just focus on presenting yourself the best you can and let the rest take care of itself