For Admission to BCA at BITS extension centres, you need to have a minimum of 50% marks in your class X and XII (45% for reserved categories). Selction is based on marks obtained in Class XII or equivalent board. There is no mention of any scholarship in the brochure. Placement report for BCA is also not available on their site. But since this is a 3 year undergrad degee, you would definitely need to go for a specialisation at a Post Graduate level.

Please note, there are no hostel facilities in these centres.

Go through this link for full details: https://www.bitmesra.ac.in/Notice_Details-98826688?cid=1&nid=103