Coding test + IQ style test. After that, scheduled an entire half day of interview. Only had one interview before being rejected. Interviewer was not the best, kept asking "and how can you improve this code" without even leading to what he might want to answer about. At one stage I had suggested multithreading, and he said dont worry about that, and then later wanted that as an answer.

I got a chat with HR to submit my grades from high school from 20 years ago. Although my grades were perfect, I realized the process is absurd to check your mental state from that far past and I dropped the interviewing with the firm.