My impression about Wharton's interview based on other XDJM's experience is: it's all depends on your interviewer. You have to know his/her background before going to this game. For example, one IB partner asked interviewee some tricky quantatitive questions; one GM type of interviewer asked more about behavior questions.
Yes. I prepared for both structured questions and some challenging and tricky questions. But I didn't imagine some interviewer would ask some quantitative questions. I studied mathematics in my undergradate major. But I am not sure about those terms in calculus.
Will this happen to me? I try to the settle the interview with Mr. Susanto. Is he from Spain or South America?