Hi Sriram...Congrats for the interview call. My piece of advice is that pls do your homework for the interview and be clear abt your reasons for an MBA at Duke. Especially your career path after an MBA and what you would bring to the class room as a person.
My interview was very exhaustive and i was asked all possible questions i could ever imagine! I wish you gud luck

My profile goes like this:
Academics: University topper and gold medalist
GMAT: 660
Full Time Work ex: IT (2 yrs)
Part time/Voluntary Work ex: International Non-Profit (7 yrs)
Extracurriculars: Very strong
With lots of international exposure and experience of working in global teams.