NIT

Dear Avnish in my opinion,you can get the admission in the top NITS of the country but since seats are allocated on the basis of cut off so we can just hope for the best.if you didnt get good NIT,you can go for some private instituions also ,thereare providing good education and placements. some of them are BITS Pilani Amity University SRM University Lovely Professional University jalandhar, Thapar University. my friend studying at Lovely Professional University told me that more than 1000 students were selected on the day-1 of the placement and more than 70% of the 2016 graduates are already having a job in hand.
hope it helps. best of luck

HelloComputer scientists are, in fact, scientists. They are focused with the theory of computational applications. That means they understand the “why” behind computer programs. Using algorithms and advanced mathematics, computer scientists invent new ways to manipulate and transfer information.And in nformation technology (IT) may adopt the monikers information systems or systems administration. Essentially, IT professionals are the users of technology. IT utilizes existing operating systems, software and applications in tandem to create a larger system that solves a specific business problem.
IIIT Hyderabad is the best college for CS in india.
visit this link for more details
http://blog.hackerearth.com/2014/07/top-5-cs-engineering-colleges-india.html
Thanks
Best of luck