Capital One Senior Engineer interview questions

Typical behavioral stuff. 3 rounds each.

System design - in the worst editor possible. Design a credit card platform. Include a payments api and such. The interviewer will cut you off and be combative over every choice you make.

Case study. If we deploy 52 weeks a year. Just kidding we don't deploy in December. So if we deploy 48 weeks per year, once every two weeks, and we need to run tests in a SIMPLE, SIMPLE, RIGOROUS pattern (every 2nd and 4th week we run simple tests, every 6th week we run RIGOROUS tests) then can we stay in budget? RIGOROUS tests are $6000 each, SIMPLE tests are $2000 each. Here's some poorly written code from an intern, where is the problem? Let me cut you off every 2 seconds while you look at it.

Given a string like "abdc5???5bjkbsdfda" return "True" if there are two numbers with exactly 3 question marks in between that add to 10.