There were two rounds and one aptitude test . Even if there was walkin drive they have not allowed people to come in after 12pm. They had asked about work experience and why you want to join here
2 round of interview and 1 final round with the manager
1st round is easy with generic question and 2nd round more on responsibility and prior experience and achievements. It was 1hour for 1st interview and 1 hour for 2nd interview