Wake's interview schedule can be found at: http://www.wfubmc.edu/school/ProsStuRes/MDProgram.htm
You have 3 interviews in a round robin format, with 15-20 minutes per interview. Normally one of them has seen the full file, one has seen just your personal statement, and one hasn't seen anything. It's pretty basic, by the time you get past the basics time is up so try to be as personable as possible and keep your answers concise and to the point. The whole day is pretty low stress, so make sure you get a good look around and stop and talk to some med students whenever you get the chance, b/c we'll give you the true scoop.