Outer Space,
I worked for KLM UK on the 50 a few years ago. The first day of interview consisted of:
1. Psychometric Test (16 PF)
2. Comprehension/Maths Test
3. Group Exercise (Town Planning)
4. Group Exercise (Mission Statement)
5. Main interview with senior captain & personel manager.
Sim ride Frasca (F-27) @ Cabair Cranfield about a week later.
KLM UK also conduct exit interviews when you leave. (I passed)
Remember, you are being assessed THROUGHOUT the whole day, not just the exercises!
The F-50 is a great machine!
Good Luck!