Are you coming from abroad and you don't even know what is Gulash?
If you are already selected by your university (and you are coming with some of your classmates to BCE), you can participate on a predeparture presentation at home made by Corvinus University.
But don't worry if you don't have the opportunity to do this before your arrival, because you can participate on an orientation programme for exchange students when arriving to BCE organized by Study Abroad. There is a private Facebook group for exchange students with lots of useful information about living in Hungary, and not just about the academical requirements. You can join this group 3 months prior your arrival.