Hello Annamsaipavan. Thanks for contacting Careers360 and we hope we will be able to answer your query. 

I am sorry to say that you won't get the previous year question papers anywhere as the exam is fully conducted online. I would like to direct your attention to this link for more information:

• https://www.quora.com/in/How-is-exam-for-Higher-Degree-Programme-of-BITS-Pilani-I-mean-about-difficulty-level-and-questions-asked

Hope this helps you and all the best!