This experience is of last round of Campus Beats program.
The process was good, maybe lengthy for some, but you get calls for next process quickly (within a week, but might take 2-3 weeks for last round call) if you clear it.
1) Your thought process on case study you solved. more than your answer, your approach matters, how analytically sounded you are.
2) If you don't know, say it, and then maybe with the help of interviewer, you can solve it.
3) Good communication skills, i have seen some with Hindi speaking also make it for BOA role, but for DAA role, its only beneficial in long term to have a good command over your English speaking skills.
4) Some puzzles, based on PnC, Set theories, Basic Maths, if you were strong in your maths during your JEE, you will make it very easily. You may get asked about Guesstimates, but i wasn't asked.
5) Questions on your resume, projects, and dont lie on your resume or atleast don't put things that you cant explain.
7) 2-3 HR questions, in this your college club activities, or any competition where you were part of, helps.
8) Last was Any question you would like to ask your interviewer.
(Total time 1hr 20 minute, minimum will be 50 minutes)