hey,

can you help us with the course name are you enquiring about because if you talking about B.tech admission then the basic eligibility criteria is candidate must have completed 10+2 with 50 percent aggregate in physics ,chemistry and mathematics , for selection process you may refer to TNEA counselling and if you are talking about mtech then 50 percent aggregate in btech is mandatory and for selection you may refer to TANCET or the GATE exam

please mention the course name in the comment section given below , we will elaborate our answer in respect of the course you are interested in.