Hey guys! Just wanted to give you my two cents since I am currently student... the interview day when I applied started out with some general info and then interviews which are one on one with a member of the faculty.They will eventually take you to the cafeteria and you will have lunch with current students.
I was asked about grades but it wasn't a main focus, they are more about knowing more about you. I was asked at the end if I was to tell the faculty one last thing about myself what would it be, so have something in mind! goodluck! 🙂
ps. rskcmu - I heard about an interview from them via email