This is a 5 years course offering an Integrated M.tech degree in Mathematics and Computing. There’s no B.Tech Degree though that hardly matters.
This course contains a variety of courses from abstract and applied mathematics, computer science and electronics giving a lot of exposure to various fields. The content of mathematics courses is entirely different from high-school stuff with more focus on understanding and writing proofs rather than computing anything. So, in a way don’t relate this to the mathematics you have studied till now.
The computer science courses are mostly taught by the professors from mathematics department and currently there are only a couple of the professors in such areas from mathematics department.