JEE

Check the link for last year's cut-offs of NITK:
https://www.shiksha.com/college/national-institute-of-technology-surathkal-Bangalore-24187/admission#admission

Yes, you can sit for JEE Mains twice. Maximum number of times you can sit for JEE Mains is thrice. Example:
Candidates who appeared in class 12th/other qualifying examinations in 2015, did not pass in 2015, but passed in 2016 are also not eligible to appear in JEE (Mains) 2018. Candidates must have taken at least five subjects in class 12th/any other qualifying examination in order to be eligible for writing JEE (Mains).

It is not dependent on the board. It's only dependent on the students and how they study and their capacity to understand the problem and solve it. But if you want know that which board should be preferred for cracking JEE Mains exam, it is CBSE.

No. This is not possible.

Hello,
If you are unable to clear JEE Mains it doesn't mean you can't get admission in any college. Try to go for state-level counselling based on your JEE rank and marks in top private colleges. You will not get any government college in anywhere because you haven't cleared JEE Mains cut off based on your category.

Yes, with the marks of JEE you can take admission anywhere in India because in every state there are some reserved seats for other state candidates so if you want to take admission in any other state, go through their counselling procedure and get a college based on your rank with other state domicile quote.
All the best.

No, you can't take admission this year with the marks of last year JEE examination because the score of JEE is only valid for 1 year and since this is the 2nd year so you are not eligible to take admission with previous year marks. Try to get admission in private college with your 12th marks examination via counselling rounds.

If this is in your OBC category rank then the chances are very very low.

Hi, Find below the link to Shiksha's the finest college predictor which will help you know about various colleges and streams that you may have a chance to fit in:
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor?utm_source=connect&utm_medium=CR_JEECP&utm_campaign=7489993
Wishing you all the best.