The oa had 3 parts. Part 1 was a two hour leetcode style assessment. Next there is a 20 minute trivia section. Then 20 minutes of mental math games. The trivia consisted of a lot of general dsa problems but also system programming problems.
The interviews consisted of an OA, then behavioural, then technical and thena final round consisting of another technical, system design and behavioural. These last interviews all an hour each. I only got up to the first technical.
OA; quite long, 3 tests
Behavioral interview: just a short talk with HR, motivation,…
Technical Interview 1: fundamental CS, nothing more
Technical Interview 2: system design, very vague but just go with the flow
Technical Interview 3: live coding, still leetcode but optiver style is a very descriptive problem, but the main thing could be boiled down into only few lines
