JEE Main

Hello Tuhin,You need to score minimum 200+ marks in Mains, then you can confirm your seat in top 3 NIT with your favorite branch.

FIITJEE-South Delhi and Narayana-Punjabi Bagh are the best coaching institutes in Delhi for JEE Mains and Advanced preparation but you have to study hard. Only then, you can achieve your target. Coachings just provide you directions on how to do all the things.
All the best!

Hello Anas,
Firstly don't get worried. Syllabus of 12th and almost all entrance exams is almost same. So if you study for one, you have studied for others. But provided you have studied for sake of knowledge and not for passing exams. You can even start now. Understand concepts. Understand subject. You will automatically score marks.

Hello Sukanya,
Yes, definitely you can. JEE Mains is an exam that would enable admission in first year of NITs. For lateral admission into 2nd year, there is normally no exam since it's based on marks obtained in Diploma.

Checkout this answer on Shiksha:
https://ask.shiksha.com/how-to-crack-jee-in-6-months-qna-4338663

Checkout this answer on Shiksha:
https://ask.shiksha.com/can-you-suggest-some-top-colleges-for-engineering-in-terms-of-placements-without-giving-jee-mains-qna-4338567?referenceEntityId=4338644

Hello Pratap,
No, it's not difficult to score 150 marks. Study is the most important key to achieve your goals.
Study well and don't take pressure. Keep calm and enjoy your work.
All the best.

Improve your basics, do more and more numerical, time management, enough sleep, and last be positive towards your goal. Don't be a day dreamer.

Yes, you can definitely get some top private colleges like BITS (if you appear for BITSAT), LNMIT-Jaipur, PSG College-Coimbatore, MIT-Pune, BIT-Mesra and some of the government colleges too.