CV evaluation by the people on selection board And A one on one viva by HR and some background check for security by the interviewers. Score and cgpa were evaluated

You'll have to take a demo class and interviewers will ask you questions. If you can explain concepts concisely with clarity and eloquence, you're likely to crack the interview. However. If you take too much time or show rush or diffidence during the process, it'll create a very negative impact.