Ancestry Full Stack Developer interview questions

Start phone screen recruiter after that takes an online test using Hackerrank with 7 questions. If we passed, they will take care of traveling to onsite interview. The onsite interview talk with 4 people, 45 mins each. Involve with React, white boarding, database and backend, data structure, and 1 session for attitude conversation. I really love this company, everyone is very nice. Unfortunately, I failed onsite interview. I think because I don't have much experience with backend and database. The question is not difficult if you have real experience.