X Software Engineer interview questions

The interview process was excellent, everyone very friendly and informative. There were two phone screens and then a full day of on site interviews. there were about 10 rounds of interviews in total.

Terrible experience. These guys serious look into your resume/background after you clear your technical phone screens. I had two technical rounds (phone and 1 round face-to-face) during which I was asked 2-3 coding questions (algorithms/problem solving). My solutions were good, and the interviewers acknowledged it. But, to my surprise I get a reject saying my background was not a fit for the positions. Why would you waste the candidate's time if you think he was not a fit for the role.