Engineering Entrance Exam

Go for ISRO, ISRO is having specialised recruitment board ISRO Centralized Recruitment Board (ICRB) through that you can get into ISRO. Please check ISRO website careers page for job opportunities. I don't have much idea about NASA. Hope it helps.

No you can't apply for EWS category in JEE advance.

For getting admission in this college in any of the branch you have to score minimum of 90+ percentile in the JEE Mains paper.

You can check out the following for more information -https://www.shiksha.com/university/iist-indian-institute-of-space-science-and-technology-thiruvananthapuram-25141.

Please visit this website for more information related to your query this will help you:
https://www.shiksha.com/engineering/food-technology-chp.

https://www.shiksha.com/university/cusat-cochin-university-of-science-and-technology-Kochi-28013/course-master-of-business-administration-mba-108659
You will find all the true and authentic information about your college here.

For the year 2020 , 112 marks ( 28.28 % ) out of 396 was closing marks in general category. But this marks will vary from year to year depending on paper difficulty and the students who applied for IIST. In terms of rank , you can have target of getting rank under 10k as of now.
Hope it helps.

https://www.shiksha.com/university/cusat-cochin-university-of-science-and-technology-Kochi-28013
You will find all the true and authentic information about your college here.

Kerala MG University better for in my view for MBA.

You can check the following for more information - https://www.shiksha.com/engineering/jee-main-exam.