Republica Havas interview questions

I applied by sending an email. A week goes by, and I get an offer letter. There was no interview, and there was no prior communication. I emailed back asking some questions about the internship, during which I then got the interview.

The team was very nice and welcoming, they made sure to answer all my questions and concerns. It was 4 rounds of interview and it was very informative to learn about the team and the company