Hi Pavitra
The basic criteria for doing engineering you should have at least 50% in physics, mathematics are compulsory subject and one optional subject is chemistry , computer science except IIT and NIT and BITS.There are some of college Delhi University and Nsit ask for 60%marks in pcm . But Pavitra if should for doing then try to score at least 60% above .In 50% pcm we will get in college .When company visit to college in final year of engineering then most company allow the student who have 60% above marks .
Hope it will out Pavitra if you have any doubt you can write comment I am most happy to help you
Good luck for your bright future!

Hi pavitra
This is Ritika
The Elegibility criteria for addmission in IET-DAVV is registered online in official website.
1.Must secured 75% in 12th or be in top 20 percentile in 12th board.
2.Appear in JEE MAINS.
Hope my answer helped you
Thank you