3 Hours total on-site interview. Began with a 1-hour coding challenge that was to be completed by yourself. After implementing the solution you talk through it with the interviewer and answer some basic questions. The next hour was a white-boarding session with two other interviewers. The problems were pretty standard for an internship role, nothing crazy. The final block was another hour or so talking about design principles and architectural choices with two different interviewers. The latter two sections also had a bit of Q&A time available to speak with the interviewers.

Overall the experience was good, but aside from the last two interviewers, the employees I spoke with were unfortunately not very personable/easy to speak with, and gave standoffish vibes.

Given a target implementation, how would you go about designing a data model to best serve the purposes of the use case?