There are 3 rounds of interview. And if you are on their IN list, they might take 4. I had 4 but then still didn't get selected. Don't know why?? 1st round of Aptitude test, 2nd round with HR and 3rd / 4th with Hiring Manager

One whole day without planning just get wait without management. Everybody will just ask you to explain and nothing will happen so technical or specific. Just introduce yourself & keep talking. Nothing matters for what you say.