Hello aspirant,
Admission process is not same for all the law schools. However, most of the law schools in India offers admission through entrance exams. With the passing of years, law entrance exams are becoming popular and competitive. All the NLUs in India (except NLU, Delhi) offers admission through Common Law Admission Test (CLAT). Through CLAT, admission into integrated undergraduate courses in law and postgraduate courses is provided. NLU, Delhi conducts its own entrance test namely All Indian Law Entrance Test (AILET). Many law schools offers admission through CLAT.
Some of the Universities also conducts its separate entrance test likeLLB Entrance Tests for Delhi University,BHU Law Entrance, etc. Admission into foreign countries is done through Law School Admission Test (LSAT).
All the best.