Optiver

It took an extensive duration to receive feedback on the application process. The online assessment, in particular, proved to be quite time-consuming. It encompassed not only the conventional HackerRank test but also included a substantial component

I've participated in behavioral interviews with this company, and I don't think they are looking to hire people. I believe my answers were adequate, but they still rejected me. I'm unsure why. I even attended their on-campus event.

After I applied, I received an online assessment shortly. It was HackerRank-styled. I had only two choices of language: C++ and Java. A bit difficult than average, but doable with a lot of practice.