Hey Alegna86!
I interviewed at UMDNJ on Oct. 15th. If I remember correctly, the UMDNJ interview invite letter says that the day starts at 8:30am, but make sure to come by 8:00am because you get to talk to the UMDNJ students between 8:00am-8:30am (and they get an adcom vote). At 8:30am the different interviewers come in one-by-one and call out the name of their interviewee. My interview lasted around an hour, but most interviews are around 20-30minutes (I just really like to talk a lot lol). After the interview Dr. Chaviano gives an informative presentation about the school; then there is a presentation about financial aid; you then go on a tour of the school. The day pretty much ends before lunch.
My overall experience was great! My interviewer and I talked about everything from my DAT study methods, to a research paper that I wrote about prostitutes and pornography, to the ethicality of dentists administering Botox to patients lol.
Basically, dont fret, be yourself and youll do great! 🙂