Getting into TCS is a cake piece for who are good in C and C++, have some good personality and very communicative and outspoken persons. believe in divine power. dont lose hope. just have a glance on past papers. but that does not give you the entire idea of TCS papers.
you may have any sort of paper and it all depends on luck as each gets different papers prepare GRE critical reasoning exercises. dont waste time in reading so many words for synonyms and antonyms. critical reasoning carries more weightage. know all the types of questions asked from TCS past papers.
IT and CSE:
1.do some project and try to know more about the project.
2.how much simple the project may be, value your project like a treasure and express the feeling wth the interviewer.
3.know everything in dbms,os,software engineering.
EEE and ECE:
1.never admit that you dont know anything about computers and programming.
express yourself with what you know.
be expressive and out spoken.
talk a lot and play with words.
have a mentality that u are a sales person and u want to sell urself to the interviewer.
mention about your paper presentations and projects.(though not even asked).
dress smartly and pay a little attention to your personality.
PROJECTS HAVE AN UPPER HAND IN EVALUATING YOU. THIS IS THE WINNING SECRET OF ME. I AM HAPPY TO BE A PART OF TCS.