First an aptitude test which was majorly mcqs, quite easy for people with a computer science background but they also allow candidates with non cs to join so it might be the reason. Then you can take part with their unpaid training which they teach in depth over basics upto creating API for backend using Spring and Java then you get enrolled for their paid program waitlist where they contact you if they have a client that fits with you.

It was good. Interviewer asked me questions based on oops, threads, exception handling, SQL . I was interviewed for 25 minutes and all the questions are answerable and at a level of basic to intermediate. She also asked me a query approach in SQL and also execute a code.