Engineering Counselling

It is difficult to get the CSE in IIT because IIT, the OBC students also want a rank under 500 so for IIT institute, you have to choose the another branch in IIT or search the criteria which may be changed. All the best.

It is not mandatory to report at the college
If you won't report, the seat is cancelled and you have to participate in the 2nd counselling.
If you get a seat in the 2nd counselling then the seat got in the 1st counselling is cancelled (if reported) and if you do not get a seat in the 2nd counselling round then the seat which you got in the 1st counselling is retained.

Hi,
It's a good rank and surely you will get a seat.

OU is a government funded university whereas CBIT is not. Culture in OU is different to that of CBIT.
I think OU is better for placements and other stuff.

You will have to think from the start only as the decisions need to be really quick.

No, you won't get that college that too in CSE. It is very tough.

Some recommendations are LPU, Chandigarh University, Amity University, CHITKARA University, VIT, Manipal, BITS, SRM, etc. Other than first four, rest do not even accepts JEE Mains with lower marks, they have their own entrance. Moreover, you can get into first four having good placements and suit your needs.