Hello Grandhi , 

Well SASTRA University takes admission through two streams. Through stream 1 which is on the basis of JEE Mains score and it fills 70% of the seats. The remaining 30% seats are filled through stream 2 on the basis of 10+2 marks or equivalent. Below I have listed 2019 JEE Mains cutoff category wise - 

• CRL : 89.75
• GEN-EWS : 78.21
• OBC-NCL : 74.31
• SC : 54.01
• ST : 44.33
• PwD : 0.11

So if someone clears their respective JEE Mains cutoff as per their category , then they are eligible to get a seat in SASTRA University through stream 1. Since there are less number of seats to be filled through stream 2 , candidates will require a good 10+2 score to get their desired seat. 

You can also go through this link and checkout the details regarding SASTRA University :  https://engineering.careers360.com/articles/sastra-btech-admission

Hope this helps you. Good Luck !!!