Last summer, I had an extern interview for an externship at Vanderbilt Hospital. It was around 45 minutes in length by the time we finished, and to be honest, there is nothing that can really prepare you for what they asked me.
She asked me questions such as "Tell me a time when you met a goal and you felt good about it" or "Tell me about a time in your life when you overcame an obstacle". Honestly, they're looking for a true response, even if it isn't the best or most important reponse. They want to see what you're made of and how you react/respond with your answers. I didn't get any questions (that I remember) about nursing actions, interventions, or anything about nursing school. They just wanted to see who I was. It's a good thing that I've already had interesting experiences in life, and that my family is a little off
So I was able to draw on those experiences to give honest answers.
Just be yourself! Be honest. I think that's what they're looking for. They want to judge your character to see if you fit in with their program.
Good luck! Having an externship position, for me anyway, was a great way to get my foot in the door for me. Finding a job has been a whole lot easier so far. When I graduate in May I know I'll at least be working somewhere now