The questions were tailored to background knowledge but mostly mathematics. The questions were interesting to solve, overall it was a good experience, however it was a long process. Interview with HR and experts as well.
Started with a meeting with the HR person, followed by 1-on-1 interviews with the front office people. Later, I learned that each product desk has a head count, and they were interviewing whether or not to hire the person to their desk.
It was a one on one interview by the hiring manager. He was warm and pleasant. He just wanted to test out our communication skills and the ability to think under pressure