Hi,
Generally admission process differs from institute to institute some give admission on the basis of marks obtained in qualifying marks while some may conduct entrance test. By the way, as you are from UP and have liked ADC I will tell you about the admission process of this college. ADC is a constituent college of University of Allahabad. The university conducts LAT. 490 seats of LLB course available at Allahabad University are filled on the basis of marks obtained by the candidates in Allahabad University LLB Admission Test. Follow the link for more inormation on Allahabad University LLB Admission Test.

I hope it helps!