The interview process was friendly, quick, and painless. The questions were exactly what I expected to be asked of a potential intern.
First there was a normal phone interview asking normal behavioral questions.
About a week later, the onsite interview (this was before COVID) involved talking to 3 developers who all questioned me about my specific strengths and weaknesses relating to software development and my academic development. It seemed like each developer was trying to figure out if I would be a good fit for their specific team.
About a week later, I got a call with an offer, and about a week to decide if I accept. I declined because I had a better offer elsewhere.