NIT

It depends on the cutoff so you need to check the cutoff of JEE entrance exam.

Hey Ashutosh,
You have very good marks in JEE as well as in your board exams. You may get a seat in NIT but that depends on the applications as well as the cutoff. You should go for counselling. Also it is suggested to have some alternate plans because as sometimes you may get the college but not your preferred streams. You can consider colleges like BITS, SRM and Lovely Professional University.

no if u belong to general category

Under the UGC grading of all the universities, UPES is a A grade university. As here you are comparing from IITs and NIITs definitely it is less. I don't know the exact ranking. But here placement is much better than many private universities like AMITY, MANIPAL, etc. Placement here is quite good.

No, his score is not enough for NITs. He can retry next time or he can try for other colleges.
All the best.

If you take admission with new scores next year, you will have to start from first year. There is no way of skipping to the 2nd year.

No, you may not get any NIT with this score. But as you are eligible for Advanced, you should concentrate on that first.

No, You may not any your preferred branch with this mark in OBC Category in NITs and IITs. Insted you can try for some other reputed Government Private colleges.