My topic was "Where is more opportunity for you ? India or abroad?"
I was in favour of india. There were 15 students in the GD. out of that around 6 who spoke something were shortlisted. No matter what they said. I was also selected :-)

Asked questions about java as i did my projects in java

asked about my family, background, hobby, etc.

just have good knowledge about the project u did and keep the interview within the boundaries of your interest.

out of around 600 students 24 got shortlisted an i am one of them. Still have SSB to be done.
good project work, good knowledge of java, confidence in java concepts and good communication skills helped me to clear the tests.