Uber Data Scientist interview questions

Recruiter round then tech screen with a DS. 3 SQL: Mix of group by, window functions and last one was hard one with Lag function and timestampdiff. Then AB testing ques, how long to run the test and metrics related to fraud detection, precision recall etc. I went into the interview answered everything but my bad luck the interviewer was a non native English speaker, it was so hard to communicate with him. All i got wrong was one question on precision and they rejected me. Clearly, the interviewer just didn't like me and just a unluck day for me