Mechanical Engineering

If you are getting more than 1 Lacs rank it will be quite hard for you to get admission in DTU or NSIT. But still try your luck as there will still be some seats left for you to grab.
All the best for your admissions in them just try your luck. Upvote if you liked my answer.

Cutoff changes every year, but aproximate cutoff will 95%.

No, it is a private college.

The candidates will have to satisfy at least one of the following two criteria for admission to IITs: The candidate should have scored at least 75% aggregate marks in 10+2th standard (equivalent) board examination. For SC/ ST and PwD candidates, the aggregate marks should be at least 65%.

Hello Renu,
You may use the college predictor tool from the link below to know your chances of getting admission with your JEE Main score:
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor
All the best.

Yes,
According to your 10+2 percentage, you can get some best colleges for Mechanical or Computer Science Engineering.

Your JEE AIR rank is good, and you will get nice Mechanical college, to know which college you may get use Shiksha JEE college predictor tool. Here is the link. https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor.

Delhi Region Mechanical Engineering-22980
Outside Delhi Region Mechanical Engineering-7154
This are based on general ranks.

Hello Dewansh, You indeed have obtained a reasonably good ranking in JEE Mains. You can definitely apply for admission to NIT's with this ranking. However to help you I am attaching a link that will predict college for you based on your ranking. https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor
Best wishes to you.