Yes, you are right there were 4, not 3.
Anyway for "private" question i just meant question that were aimed to test your motivation and psychological profile more than your potential attitude to fly.
Considering that I assume we all here are more than motivated and that is really hard to judge profiles only on few answer without having at least an interview, i was only wondering what they were expecting from us to be selected.
Anyway mine was just a consideration, not a criticism.
I am sure the selectors are professionist and they are doing their job in the best way.