Sumo Logic Senior Software Engineer interview questions

1 recruiter screening, 1 online coding, 4 onsite technical interviews with coding / design. The process was very fast but hard (Google style / leet code). All recruiters and staff were very friendly. They wanted me to succeed.

It starts with a online coding question, question was not clear at all, anyhow I solved it, after reading several test cases and guessing the question, after that had one more online interview round, I solve the question still the interviewer rejected me, don't know whether he didn't like my face :xD