IIIT Una - Indian Institute of Information Technology Answered Questions

Frankly speaking, IIITs are well known for information technology courses. It's quite tough to differentiate between these institutions. However, to help you I am attaching a link that will give you all the required information about not only these institutions but all the colleges in India which are offering this branch for studies.
https://www.shiksha.com/b-tech/ranking/top-computer-science-engineering-colleges-in-india/46-2-0-0-0
Best wishes to you.

If you don't belong to general category then you can get admission in few NITs and IIITs.
To know in which NITs or IIITs you are eligible to apply, use the college predictor tool:
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor

In all honesty, it depends on the pace of work done at your institute. There is a slight chance majority of your degree won't be completed at your own campus, but highly unlikely that you'll complete 4 years not being at your campus.
Again, it depends more at the pace of work and how fast the government gives out clearances to your institute. I have seen some work finished in a jiffy (I study at a government institute as well) and some which has been going on for years and is yet to finish.