The recruiter contacted me via linkdin and set up a phone interview with one of the data scientists in facebook. It was supposed to be 45 minutes and the recruiter had already sent out a detailed email of what to expect. The interview began with a sql coding qs , followed by A/B test questions and how to track decrease/increase of metrics. I was able to answer each one of them but the interviewer seemed hardly interested and there were no follow up questions as if he didn't find me worthy of engaging in any conversation. My overall experience was bad and I could have cleared the interview had there been a better guy with more experience and understanding of how interviews are conducted.