First they take a written examination which tests programming and analytical skills. Then, there are 3-4 rounds of interviews. Not much technical. In one, they discuss the written exam and few easy problems, second would discuss your profile or past projects, third would be on some programming stuff, fourth would be mostly on hr and your questions but may include some programming too.

I had a recruiter call and they said they would send me a link to a Karat interview round in a week but I never received it. I mailed the recruiter multiple times but got no response or communication about it