GLG interview questions

I was interviewing for the associate role within the research team. I met around eight people in total, each person gave a round of interview. This is possibly a bit more than a usual number of rounds because I interviewed with people in different cities. Most interviews last around 1-1.5 hour per round, the longest one is around 2.5-3 hour which includes a case study and presentation apart from the usual behavioral questions.

I had a 25 min phone interview which is the first stage. The interviewer gave the impression that I would be proceeded to the next stage and I genuinely thought I did well too. The next day I was informed that I would not be proceeded. Surprising.