I interviewed for EA program and was then accepted. The interview was nothing to worry about. Its split into two sections. I don't know if you have a morning interview or an afternoon. Mine was afternoon so this old guy showed us around the hospital while the other interviews were being conducted. The interview itself is largely conversational. two out of my three interviewers didn't ask me any questions. I talked about Israeli politics with one guy and how sweet sabbaticals are with the other guy. Dr. Davis interviews everyone and he is the most intimidating because he doesn't react to any of your answers. He just asks very basic questions you should be prepared for: why medicine? favorite class? favorite activity?
If you're a penn state undergrad, you should have no problem getting in. my interview group was like four kids from upark and a couple others from some small school in the boondocks of PA. those kids didn't have a clue. the kids from penn state were on point and most of the ones I talked to afterward said they got in.
just stay calm and relaxed and keep the conversation flowing and you should have nothing to worry about. good luck!