There were 3 rounds, one written test which was online..
All the eligible candidates were allowed to appear in the written test. Written test was totally aptitude based. There were 3 sections Maths,Reasoning and English.Level of questions in Reasoning and English section was quite tough

Technical :
1.What is your favorite subject?
2.WAP of Fibonacci series in C?
3.What you have done during summer project?

1. About family background.
2. Whether I would work at any place in India or abroad?
3.What are my positive and negative qualities?
4.Why I wanted to join TCS?
5.What are my expectation from TCS?

1. Never let the interviewer know that you are nervous
2. Always keep a smiling face.
3. Don't write such things in your resume about which you have no knowledge.
4. Don't give wrong answer.Say sorry straight away if you don't know the answer.
5. Should have knowledge about the project you have done.

150 candidates appeared in the first round and 110 of them were selected after interview.
MY PAST ACHIEVEMENTS and a little bit of luck..