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
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.