It was very informal and with just one person - and not much technical detail, more of an initial "meet and greet" with both of us getting a feel for the the other. I think it was evident at the end that probably neither side thought it was a great match for a variety of reasons.

Had close to 10 rounds of interviews over 3 days and no offer. After 7 rounds of interview, the HR gets back saying that they are very impressed with me and I need to have final meetings. After the final meeting, they say that they've hired another candidate. This is very disappointing for the following reasons: 1. They gave me false hope through out the interview that I was doing well and finally declined without providing me a concrete reason. 2. They had 3 separate days of onsite interviews(close to 10 hours in total) after 1 phone interview which is an absolute overkill given that after each onsite I was mentioned that 'this is going to be the last rounds of meeting'. 3. They were not frank with their reason(whatever tiny crappy mail send to me). The reason was ' pursued another candidate for our position'. I was told on multiple occasions during the interview (even at the final technical interview) that they found me as a good fit for 2 teams.. How come another candidate can fill in both roles? My advice to the company is : Firstly, if you cannot complete a candidate interview on 1 on-site interview,, do not trouble him/her. Secondly, the same person need not interview a candidate multiple times; it is the duty of the interviewer to judge the candidate in a single round. Thirdly, provide a solid feedback to the candidate if he/she is not hired; appreciate the candidate's effort and time and tell him/her frankly as to why he/she may not be a good fit. The interview taught me to decline any future interviews where the team wants me to undergo more than 1 day of on-site rounds of interviews.