The interviewer was very rude, not at all satisfied with every answer I gave to his questions, I guess it was his first time interviewing a candidate, treated very arrogantly and stated every correct answer I responded as wrong. Once the interview was completed, I checked every question, every answer I told was fair enough. Example question: When I tried to write a SQL query to retrieve the rows present in one table but not in the other table, I used "MINUS" operator in the query, the interviewer debated with me that there is no such operator in MySql.