Meta Data Scientist, Analytics interview questions

Facebook has some of the most candidate-friendly recruiters I've ever come across. After the initial 15 min HR interview, I had a 45 min interview with one of the hiring managers. Since I was coming fresh out of college, I was asked to attend a Graduate-hire Data Scientist Interview Prep Session which helped a lot. The HM asked me Product based questions which were not too hard but I stumbled while answering (I think this is why I didn't go to the next round) and the SQL questions were easy.

Made it through the technical screen. Straightforward questions, but the interviewer was stone-cold and did not provide any feedback during the interview, making me unsure whether I was on the right path at all in my responses. Never had an interview where the interviewer refused to comment at all on the process - threw me off and made me unnecessarily panicky.