I had 3 interview rounds. During all rounds, questions were on my project and System Verilog based questions. They would give me a week's time to prepare. It was for an unpaid position and they said based on my performance they would convert it to full time.

I was referred by a friend. There was no interview as such. Just had an interaction about skills and roles. Explained the products they were working on and discussed the terms of the employment.