OA: Sequences or 80 in 8 (foggy memory), 3 Zap-N games, beat the odds probability questions (90 secs per question, 30 questions). Most of the screening happens here.
One round of interview: Behavioural with HR online.
OA was not that hard, but got cooked because I'm washed. Definitely doable with practice though. Covered a lot of expected value and probability. Some of the questions were a little strange, but were overall alright.
I applied online. I interviewed at Optiver (Amsterdam)
Interview
Just 1 round of HR screening, all of them were behavioural questions including background, why do you apply to this programme, past internships, biggest mistake, what would you have done differently etc