The technical interviews had basic physics questions. I don't remember anything specific, but they resembled something like: if a train is going x fast, and it collides with a stationary bale of hay that weighs y amount, how much do we expect the bale of hay to be displaced? There were a few creative thinking questions as well. The interpersonal interview focused on why I was interested in the industry, what my career goals were, and how I thought I would fit at the company.