In my previous interview, I didn't do well in market estimation. I got a credit card market estiamation question and case (possibly since I've worked in commercial banking before). When doing the estimation, the revenue source of credit card that came to my mind was "transaction fee". I didn't know "interest rate" was actually the major revenue source until the interviewer told me that after a few hints.
My problem is: is it okay to "clarify" the revenue source with the interviewer, especially if the interviewer expects you to be familiar with this industry? What would be an elegant and diplomatic way of phrasing the question and driving the process? Thank you.
