Meta Data Science interview questions

HR reached first, ask my experience and one very simple product question. The first round interview: 2 SQL+ 2Product. Need to organize well the answers. SQL questions are about the search. Product question: one is about product design: Facebook want to design a local refer page, how to use data. Another is about AB TESTING

It was a role based in the London , UK. The interviewer called me in the middle of the day, which I did not quite expect and was quite unprepared. She called to tell me more about the role, and if I was interested.