The interview process is normally meant to happen back to back on the same day- which FYI would take hours out of a applicants day- mine was spread out over several weeks but it seems like the different interviewers did not speak to each other as I was invited for a first interview twice. The questions are a lot of hypothetical questions- what would you do in this specific scenario- many of which were scenarios which wouldn't cover the job role I was interviewing for.

Lots of consulting-type questions. I suggest preparing for this to get used to the line of questioning. Sample types: How many ping pong balls can fit in a Boeing airplane? What is x multiplied by x? The goal is not to have a correct answer, but for them to understand your line of thinking