They also asked my fiance a few questions. He said it was quick and simple. He was asked:
How and where me met
How long we´ve been together
Where I lived
Where I worked and what I did
They asked him to write my name on a piece of paper
That´s it! I prepared him for week and he told me all of that preparing was a waste of time! Better safe than sorry though. (note: he´s a Moroccan citizen but Spanish resident)