Fidelity Investments Analyst interview questions

Interview lasted about 3 hours and I interviewed with 3 different managers. There were some technical questions, but majority were based on my current experience. Interview wasn't too bad it was just long.

1) Telephonic interview which lasted 30 min. Included 3 case studies 2) Flown down to Bangalore for a series of 1:1 interviews - which included three 1:1 interviews (not including the HR interview) 3) The interviews constituted of 4 written and verbal case-studies which directly test the skill sets across everything mentioned in the Resume (example - as a consultant how would you help an oil and gas refining company kick start stagnant revenues - in an otherwise growing industry?) 4) Also included 2 market sizing exercises to gain understanding of the candidates problem solving skills (example - do a back-of-the-envelope market sizing of the shoe-lace market in India) 5) Each interviews appeared progressively tougher than the previous one