Hey Lakshya.
Lets start from class 12 percentage and gradually advance towards LLM and job opportunities.
For appearing in CLAT, AILET, ULSAT, IPUCET, Nirma University, you will require 50% in your class 12. However there are other law entrance exams which demand 45% in class 12, like MHCET, AP LAWCET, TS LAWCET.
Next up is the requirement of BA LLB or additional study of LLM. You can very easily get a job right after BA LLB. The condition is that you will have to work very hard in the 5 years of your college and develop ypur skills like no one else has done. Do something different and creative from others and enhance it to the level that the recruiters fall head over heels for you. Talking of LLM, it will be a cherry on the cake. But because candidates had spent 5 years already in BA LLB, there are very less who go for LLM. Though LLM will give you far more job opportunities, and the chances of getting a job abroad also.
As for the experience, you will definitely have to go for mock courts and internships at decent places for the development of your skills and for increasing your chances to get selected for companies which have a good name. Make sure that you score a fair percentage throughout the college years.
Thats it! I hope I have answered all your queries in here. Please feel free to respond and ask further questions.
All the best.
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