Dear Lakshmi, BITSAT will be conducted in 2 slots each day. The first session will be from 9am to 12noon and the second session is from 2pm to 5pm. You can choose either of this based on the availability. The BITSAT slot booking portal will be open from March 28th to April 8th, 2019. The slots will be on first come first served basis. To book your slot, you will have to login to the portal and select Date, Time and Exam Centre. Upon succesful slot booking, the admit card will be generated with the detais of the slots.