At AMS, all arrivals and departures intermingle happily...security checks are carried out at the departure gate. ID & a boarding card are required to access the departure lounges, although they are not 'sterile' areas. I presume Schiphol do not separate arriving and departing pax to make life easier for the huge numbers of transfer passengers at that airport (I think 40%+ of total pax numbers).
The only separation is those passengers going to Schengen destinations, and those going to all other destinations.