SASTRA is a deemed university and it has released its application form for the B.tech course. You haven't mentioned the course you are interested in. But if you were asking about the b.tech admissions then you can apply in online and offline mode.

You can check here :

https://engineering.careers360.com/articles/sastra-university-btech-application-form

If you want to enroll in any other course do visit the official site of the college-

www.sastra.edu (//www.sastra.edu)

Hope this will help.