Capital One Senior Developer interview questions

Online technical screen - four questions in 70 minutes on a hackerrank-like platform. Each question is a little harder than the last. Definitely get /something/ working for each question, even if you don't pass all unit tests. I was able to pass the assessment with failing tests on the last two questions. Power day (as they call it) was 4 interviews, 1 system design, 1 coding, 1 case interview, and 1 behavioral. Pretty standard except the case interview, which I found to be easy. Just keep talking - come up with ideas and justifications for the problem they present.