It's not really much of an exam. You will stand up there and go through a section from LabVIEW Core I. I had to talk about loops for 15 minutes. After you give your discussion, they will point some things out to you about things to watch out for. Really, they are just making sure you are not going to make a complete fool of yourself.
And tell Dave I said "hi". He is the best NI instructor I have ever had.