BlackRock Operations Analyst interview questions

My first interview was a phone interview, very straightforward about my resume. My second interview consisted in 7 1:1 interviews of 30 mins each with 7 different departments. It felt long because I did not have a break. They started by giving an overview of their department and then they asked me about my resume. They also asked me questions like what was the most difficult obstacle you overcome and where do you see yourself in 5 years. After that interview, I was asked to go back to interview with two of the departments. The format was basically the same except they asked me specific questions about Excel.

pretty straight forward interview process, applied to a different position and was shifted into this one. I met with members of the team, one being an analyst, one a manager, and two directors (one from my team and another from a partnering team). I was questioned on my resume and experience with a few brain teasers mixed in. The interview went well and I was told I have moved on to the next step. This is the kind of strange part..my final interview was with the Managing Director of that section of business and instead of in person it was over the phone. It seemed more of a casual conversation aka they wanted to make sure they at least got to speak with me and was part of the process of hire.