I went through 3 rounds of interviews and 1 logic test. Interviewers are quite friendly. The difficulty and requirements are different for each candidate and it really depends on which interviewer is assigned to interview you. Therefore, it really depends on luck. I have a friend having 3rd class honors got offered, and friends with 2nd upper got rejected.

It lasted for an hour and asked questions about self-introduction, work experience, and problem-solving experience. In particular, I asked deeply about the process experience. Also, interviewers require expertise and creativity.