Hello Aspirant,

The eligibility criteria for diploma in engineering is either secondary education (10th) or higher secondary education (12th) the minimum aggregate marks will depend on which college you are applying for. You can also make use of lateral entry system and enroll in B.Tech by your second year of diploma.

You can find the top colleges in India offering diploma in engineering in the link provided below

https://engineering.careers360.com/colleges/list-of-diploma-engineering-colleges-in-india

Hope this helps and Good luck