hello anshita tyagi,

you can book your exam slot on the official website of VIT. you need to open the, then on the left side you will see the exam slot booking dates , just click on that, a new page will be open , scroll down you will see a blue button with EXAM/SLOT BOOKING DATE button , kindly click on that button, rest you will know the process as the date are not released yet it will be released on 28.03.2019 or before this daet. so you need to wait and have to check time to time. 

i hope this information helps you out. all the very best have a great future ahead. and if your feel any doubt lindly ask in the comment section below, i will definitely help you out.