IBM Software Engineer interview questions

I attended off campus interview on 2020 for IBM in Chennai. It was a very good experience in attending. It took two days for interview. First day they will conduct Aptitude, Small Programing, English test, puzzle solving game totally 4 rounds. And i received mail on evening- cleared all , they called me for next round on next day. Second day was HR round only. Once you cleared all rounds on First day, 80% of chances to get selected. In HR round is very important for communication check, about yourself, asking few technical questions. If you cleared all these rounds. Next process is Document Submission that happens on same day.

i was asked for timing for interview.but they scheduled interview in different timings .The interviewer is junior than me.but not well treated during the interview.I asked for the feedback from the hr.why i was not selected.but i didnt get any response from them