It sucks, totally sucks, they called me at 12:30, thanks to the consultancy they arranged a cab for me, when I reached there I came to know they have called in batches means one batch 8:30, next 10:30 then 12:30 and then 2:30, so almost 400 people are there and they have vacancy of around 30 people, so we reached at 12:30, they waited for presentation for around half n hour and after that they took a long 1 hr presentation, after that they gave us biryani and it was the good part and till now clock was already showing 2:30 and now they started the process, so they called 10 of us in a room and nobody showed up till 5:30, so it sucks and it was unprofessional. After that my interview started at 6 and ends at 6:15 and the interviewer didn't ask anything professionaly and it was just a formality to take the interview by then for interviewer.
And the best part while coming back from the same cab which dropped me to the hotel ,told me that "Sir, I was going to tell you the same in the morning, that you are wasting your time by going there because it is same for each and every candidate".