Hi,
I am Ankit Dhir, from SKIT, Jaipur. TCS came to our college on 19-12-2010. They conduct selection process per each round. There is 4 rounds
1) Aptitude test.
2) Technical round
3) MR (for some student they take MR with Technical round and for some student they take separate MR round )
4) HR (they take GD in HR round)
Before going to the TCS Aptitude test read the previous question from fresherworld.com and take sample test on https://openseesame.tcs.com You can cover all question from these sources. Out of 35 question you can't find any of question other then this.
Aptitude test consists 35 questions, 80 mins, online test.
Here I'm discussing Interview rounds
For technical round be aware of basic funds of your core subjects and C, C++ and your project. If you crack the both aptitude & technical round you are 90% selected.