Uttar Pradesh

B.Sc from Amity University, Noida is good. As they have a decent syllabus, good labs, the faculty is supporting, they offer summer internships, excellent infrastructure, no ragging, the online portal (Amizone), and foreign language. Amity is strict in terms of attendance and has very good for security. You can check for the further procedure on the website given below:
http://www.amity.edu/aib/A05043.asp

You can get through management quota.

Yes sure, you need to fill online form, and you also sit for a Entrance Exam & P.I.

It depends on your percentage and how you cracked your entrance exam.

There is no such process. If you want to make a career in CSE only then you must opt for B.Tech in CSE. But in post-graduation, if you want to pursue M.Tech in CSE then you have to appear for GATE so that you can get a seat in IIT, IIIT, etc.
Best of luck.

I think there is no "best" thing in studies. Only we are the one who makes everything better through our hard work and dedication. But as to answer your question, in my opinion, FIITJEE has the best faculty members all over India. here are the reasons:
1. The test series of FIITJEE is up to the level of real JEE Exam.
2. The modules of FIITJEE are designed in a good way.
3. They gave the best result.
4. They do not buy toppers.
5. They publish their actual result. There's a platform called StandYou which provides the platform to the students to search-compare-apply for more than 30000+ coaching in 120+cities on basis of 75+ data points.