Computer Science and Engineering

Look Rokesh,
Every branch has its own value whether its CSE or ECE. It's you who have to decide which branch is best for your career. As CSE has great demands nowadays but it doesn't mean that ECE is not a good branch. If you go with ECE, you are eligible for Public sector exams too.

How to prepare for PSUs Entrance Examination:
Question Paper mainly consists of two major sections:
Technical Section: Subject specialisation of related stream
Non-Technical Section: General Awareness, Current Affairs, English Language, Reasoning & Aptitude. Hence to crack PSUs competitive exam, candid

Qualifying Degree-Qualifying Degree/Examination
BE/B.Tech/B.Pharm. Bachelor's degree in Engineering/ Technology (4 years after 10+2 or 3 years after B.Sc/ Diploma in Engineering/ Technology). Currently in the final year or already completed it in 2018.
Yes, you are eligible.
Good luck.

Yes, you will get admission. There will be no issues in it.

Yes, you can expect a seat in this college. But I sincerely suggest you to join in your career designing branch. Ask your heart and answer your interests to avail a chance to know about the branch you're interested in.
Hope this helps you. Keep asking.

It is a very low rank to get NIST for CSE branch.

With such a good score, you should go with any good college. Most of the colleges provide scholarships based on the board percentage. I would suggest you to first think about a good private college instead of scholarship.

Make a comparison between them and be sure which one is better. For comparison refer to the given link:
https://youtu.be/3YAzEP1vgvQ

Make a comparison between them. For comparison, refer to the given link:
https://youtu.be/3YAzEP1vgvQ