For those of you asking for interview tips, I highly recommend taking a look at this:
I was asked questions extremely similar to this in my interview. During my peer interview, I was asked a lot of situational questions mainly about how we would deal with the families (especially when they were upset with the care their baby was receiving), since a large part of our job is centered around caring for parents during one of the most stressful times of their lives. I think it is extremely important for a NICU nurse to not only tend to the needs of the patient, but also for the families. I love teaching and I made sure that these points were emphasized during my interview.
As for what you need to know when you hit the floor: for me it was just a healthy dose of fear. Fear of taking care of a tiny 23 weeker, or even just being scared of handling a ventilated infant. My nurse educator told me she didn't care what we learned in nursing school, she just wanted us to learn what she was teaching us. Sometimes I think, why did I even bother going to nursing school? It is like a whole different world in the NICU and you will have to relearn a lot of things.
With all that being said, I love my job more than anything. Even after having to call a code or having an extremely unstable, high maintenance kiddo, I still look forward to going to work. This is a 2nd career for me and I have never dreaded a shift like I used to. That is how I know I am in the right place. :)