Vedantu Software Engineer interview questions

Ot followed by 2 tech interview rounds and one hr round. ot contains some mcq as well as some coding questions. after that 2 tech interwiews were there followed by one hr round.

I contacted a Senior Software Engineer from LinkedIn for SDE role. He arranged me an interview telling that he have high expectations from me. There was no Online Assessment, only One round of Interview, DSA Based. Interviewer asked a dsa question, I solved that problem in 10-15 minutes with a good structured code. I help interviewer to understand the code by the help of dry run. Interviewer seemed satisfied to me, and I was sure I am getting the offer or next rounds if interview. But that evening itself, I got a rejection with no reason When I asked about the reason if rejection from the interviewer, at first he seemed shocked about my rejection, then next day he told me a lame reason of my rejection. This was a really bad experience! If they don't want to hire me from the starting, why they wasted my time for the interview round? Please don't ever go for this company!