Engineering Entrance Exam

Is here DAVV refers to Devi Ahilya Vishwavidyalaya or something different. Please specify this acronym, then we could give you complete answer regarding your query.

For JEE, maximum weightage is taken from 12th when compared to 11th in CBSE. If your 12th score is not enough for JEE weightage then you need to score little more in JEE Mains. This could help you in getting a seat in technological colleges.

200+ marks will BE require for JEE main to get admission in NITs.

Go for NCHMCT because it is a national level exam basically for admission in 21 central universities of hotel management. I will suggest you to opt for this and score good marks so that you can confirm your seat in one of the government college. For any other query please feel free to ask.
https://www.google.co.in/amp/s/www.shiksha.com/hospitality-travel/hotel-hospitality-management/exams/amp/nchmct-jee.
By qualifying this exam you will have little worry about job perspective.

Go for NCHMCT because it is a national level exam basically for admission in 21 central universities of hotel management. I will suggest you to opt for this and score good marks so that you can confirm your seat in one of the government college. For any other query please feel free to ask.
https://www.google.co.in/amp/s/www.shiksha.com/hospitality-travel/hotel-hospitality-management/exams/amp/nchmct-jee

Yes, you can. But, to get into prestigious institutions you have to crack JEE.

If you had more than 160 marks the chances are more to get in to DTU. If you score more than this you should apply for DTU 2018 admission.

Rank near to 1500 in general-PWD category can get you a seat in NITs for OBC and SC/ST PWD category marks required are even slightly lesser.
All the best.

You should attempt JEE Mains and if you qualify JEE Mains, then you will be eligible for the JEE Advanced. According to your score in these exams will decide your branch and IIT, NIT colleges for Aerospace engineering.