Everyone in big tech, what kinda interview process you went through for landing ML/AI jobs.

Wish to know about people who applied to ml job/internship from start. What kinda preparation you went through, what did they asked, how did you improve and how many times did you got rejected.

Also what do you think is the future of these kinda roles, I’m purely asking about ML roles(applied/research). Also is there any freelance opportunity for these kinda things.