I applied online.

I applied, was given the OA, and then invited for a r1 technical interview. The question given to me was fairly solvable if only the interviewer had explained it well. We ended up having two different understandings of the question, leading to different approaches. We realized this in the end, but it was too late.

I was asked a trapped water version of the question and had to solve it for 30 mins. The interviewer wasn't good at explaining the question, so we had some misunderstanding.