FABEC and SES are very much words of the day at Eurocontrol, so some knowledge here should earn you plus points.
About the exercises, it's not about solving them straight away (which rather shows you've been speaking to yesterday's candidate) but about changing your approach to the problem once you get stuck.
my younger brother is a ATC student for 2 years now at Eurocontrol
Initials? Hope you get good news in the morning