B.Tech

You have not specify about the marks obtained in 12th. However the admission in SASTRA are based on the following two streams as under.
1. Stream-1: JEE Main marks + 12th Marks ; 70% of seats will be filled through this stream, Under this stream the weightage of JEE-Main marks is 25% and for 12th marks 75%.
2. Stream-2 : Marks obtained in 12th; 30% of seats will be filled through this stream. The obtained marks will be normalized with respect to the topper of each educational board.

It depends on the level of colleges. If you are trying for IIT, then above 75 is must! You wouldn't get nice colleges below 70%. Try to score your best. 50 - 55% is the minimum to get admission.

Hi there,
It is not at all possible with such score. Not in IITs at least. Try for another chance, prepare your best.
All the very best!

Here are they-
International Maritime Institute (IMI), Delhi
Maharashtra Academy of Naval Education and Training (MANET), Pune
Indian Meritime University (IMU), Chennai
Indian Meritime University (IMU), Mumbai
Indian Centre for Advancement of Research and Education, Haldia (ICARE), Haldia.

It depends upon your rank. According to previous year record closing rank was 31517.
Please wait for JEE to publish the AIR. Maybe at the end of this month they will publish it.

Eligibility criteria for admission in GME:
Minimum 50% required in graduation with Mandatory Course: B.E. / B.Tech(Mechanical Engineering, Naval Architecture).
Also, the candidate must have minimum 50% marks in English subject at 10th OR 12th or in degree exam.
For more details : https://www.shiksha.com/engineering/course/graduate-marine-engineer-the-great-eastern-institute-of-maritime-studies-geims-lonavla-pune-29782

Yes, you can do B.Tech in CSE through lateral entry.
BITS Pilani
IIT-Delhi
National Institute of Technology, Karnataka
VIT University, etc.

Hello Dev,
It's very nice to hear from you that you are interested in pursuing your studies in the stream of Artificial Intelligence and machine language. Even to think of this at a tender age when you have just completed your 12th is a very good sign. It is also very heartening to know that you have already set your aim for what you want to achieve in life. Keep it up. I am attaching a link that will give you all the required information about this course and different colleges which are offering this course. https://www.shiksha.com/it-software/ai-robotics/colleges/colleges-india
Best wishes to you.

Yes, it is. If you are planning to get admission in MNNIT - Allahabad, then math subject is compulsory. For more information, you can contact or visit their official website.

Hello Ram,
Yes, you can get seat through management quota after Diploma. You will get direct second year admission.
Best luck!