Meta Data Science interview questions

This position is very analytics. Onsite includes a presentation (for PhD), 2 rounds of case interview, 1 round of SQL, 1 round of probability & statistics. Pretty nice experience and nice office building.

Through employee referral, I first had a non-technical phone screen with a recruiter. I was then asked to do a live coding interview with a FB data scientist (split screen; half video half coding). The interviewer was a nice and well meaning person (even gave hints), however I failed to solve a (in hindsight) quite doable coding challenge. I was asked to apply again in six months or so.