I was interviewed by 3 people. They asked me about my participation extra curricular activities and about my internship experience. My advice to everyone who will interviewing with E&Y is when the interviewer asks the question "tell me something about your self" (which in most cases is the first question and the most commonly asked question) make the most out of this and sell yourself in the best way you can. Talk about all your achievements briefly showing them that you have excellent leadership skills, you are an innovator and not a follower. This is your chance to make an impression and to really drive the interview the way you want to.