Hi Priyamvada,

Thanks for asking, tell me which college you are opting for? Look, there are two ways by which you can enter into 3-year LLB course:

1- Direct admission (in some colleges)

2- Admission by the entrance exam. 

For 5 year integrated  LLB, only the Entrance exam is there.

Check this link for more information.

https://www.careers360.com/news/9564-law-entrance-tests

Good Luck!