My assesment was like this:
I started with the sim. They dont expect to fly perfect. Make sure you know the briefing pack, and do a good briefing before flight. Use your co pilot and work along with him during flight.
My interview was about 15 min. All tech questions was related to my previous aviation related work. What info is on loadsheet? What is the engine fire drill on your previous airplane? seats in 737? What is lenticular cloud? Difference between de-ice and anti ice and one example of each? Then some quick simple HR question. It was a relaxed atmosphere.