Dear Aspirant,

To get admission in any college for B.Tech degree , you must take an entrance exam (JEE MAIN/JEE ADVANCED/ Other state level Engg exam)and qualify the required cut off .

Well , some colleges adds compulsory eligibility criteria to score a ceratin marks in 12th !

you should have physics and mathematics in 12th!

You can  opt for these colleges in Delhi region  for admission in B.tech CSE :

1. IIT Delhi
2. JMI, New Delhi
3. Amity University ,Noida
4. DTU, New Delhi

To find more engg. colleges in Delhi, refer to this link:

https://engineering.careers360.com/colleges/list-of-be-btech-colleges-in-delhi

Hope this helps !!

best wishes !!