Can't speak for 787 but 737 selection was very "personality based", they seemed to accept that if you had done the job for a "number"of years you were probably not a retard. (or conversely probably were
)
I could imagine any Tech stuff will be ETOPS /Long Haul based, with no doubt some probing into how you forsee planning your life around taking Days Off in 2 different continents.
Very nice folk, relax and be yourself, they are looking very much at how you will fit in CRM wise.
Nice (cheap) lunch avail in the canteen too, avoiding gold-plated Oslo prices.