Hello Bhushan Mahajan. Thanks for contacting Careers360 and we hope we will be able to answer your query.

Note that colleges accept admissions by lateral entry. That means, students who are diploma holders can go directly into 2nd year of the undergraduate program. 

But, it depends on the college whether they will keep an entrance exam or not. Please, Bhushan, can you comment below my answer with complete details of the college you are aiming to study in?