Pilot Pete
I guess that we were talking about different scenarios, those 3 interviews I have personally attended during the last 6 years have all been such that the sim evaluation was done STRAIGHT after the (relatively short) interview.
I do agree that the best way is to tacle one hurdle at time, make it as easy and simple yourself as possible. And, like most of these cases, I guess there's not only one way to do things right...
Because it's virtually impossible to cover all different kind of questions there might arise during the interview, I do recommend very warmly you all to check out this excellent book: "Ace the technical pilot interview" by Gary Bristow,
http://flightgadgets.com/acetepiinby.html , I think that it will cover most of (even the trickiest) ones they might throw on you!