My jee rank is above 2.3 lakh

SASTRA university does not give admission on the basis of JEE mains only it also consider the board percent which should be 95+ or minimum 90+ And in mains 100+. They prepare their own merit list on the basis of 2 criteria:First criteria have 70% of seats. Admissions are given by taking 25% weightage of JEE mains and 75% of boards.Second criteria include admission on the basis of boards marks only. But it has only 30% of seats, so for these criteria, you should be having 95 or 95+ for securing your seat as in this criteria competition may be very tough.According to that, I think you have a good chance of getting into Sastra as your board marks are really good.

Yes u can be placed

All the best