JEE Main

You need to score around 230 or somewhat to get admission in NSIT for CS. Last year it was 250 for general category. So you need to score around 230-270 to get hassle free admission in NSIT.
Hope this helps you. Be free to share any problem you have.

You have to prepare for KCET exam and appear for it. Refer the previous year's cutoff of the college.

For admission in the college you have to give the TNEA exam and you should be the resident of Tamil Nadu. For more information refer the link below:
https://www.shiksha.com/university/anna-university/exams/tnea

Your rank should be around 15k for National Academy and Safety Engineering, Nagpur.

Sorry but once you skip the counselling you cannot get admission on the basis of your JEE Mains score.

No, JEE Mains is not mandatory. You can directly approach the college on the basis of your academic score.

For HBTU your rank should be around 4000 in JEE Mains. HBTU provides decent placements but you cannot expect much lucrative packages, apart from that, students from HBTU excel in various competitive exams like UPSC, CAT, GATE, CDS, GMAT, etc.

No, but candidates need to have secured minimum 75% marks in class XII or equivalent exam or be in the top 20 percentile in their class XII exam conducted by the respective board. For SC/ ST candidates, the eligibility criteria is to secure 65% marks in class XII or equivalent exam.

Take a drop, and prepare as general category and study properly if you want to come in Manit.

The cutoff in JEE Mains for mechatronics is 185 marks for general category.