To someone who has never been in a 737 or larger cockpit, even knowing where to start setting up the plane avionics systems for instrument landing would be a challenge.
Ah, yes. I forget to mention cockpit and SRM. Our CRJ sim sessions, while not quite like an airline new hire class (but taught by a former sim instructor) are 2-3 hour sessions where we go from cold starts to energencies and eventually shutdown. There's a whole day spend on displays and system pages, a day on the overhead and side panels and radio panels, etc. But the before landing checklist is a little bit more thorough than "prop full, mixture full rich, fuel pump on, flaps landing."