The interview consisted of three rounds-
1. General screening by the IBM HR - Self introduction only here generally.
2. Second was English voice and accent test - thought process, fluency and accent tests where you would be asked to speak on a few topics. You would be marked on 5 or 10 in these tests, i believe.
3. Third was the Operations Manager round you are asked some basic troubleshooting questions and checked for your stability and attitude. A Tip here: Remember to remember the manager's name as thanking him by name at the end of the round works miracles. "The sweetest sound in the world for a person is the name of his/her name" ;)