NIDA/WAAPA Auditions

Hi, I'm auditioning for NIDA, WAAPA and VCA this year for the first time. While I'm not naive enough to think I'll get in first time trying (or even second) I would like to give it my best and was wondering if anyone who has auditioned before could tell me what to expect. I'm aware the panel will probably be ruthless but I was wondering if anyone knew what types of questions they ask etc if you make it into the afternoon session? Any advice would be greatly appreciated. Thankyou, Amelia