What is the scope for BCA+MCA, B.Sc+MCA and B.Tech+M.Tech? Which one is a better combination?

SIMPLE CONCEPT BCA+ MCA ONLY B.Tech Similarly: B.Sc+ MCA B.Tech hence B.Tech+ M.Tech is more powerful degree other than given. Scope is that you can placed at MNCs as system engineer.

If we check combined syllabus of BCA and MCA then it is often equivalent to Bachelor degree of engineering. Study is all about syllabus, if you are going to conquer wide range and meaningful syllabus then it will be definitely helpful in career. Usually done after BCA MCA courses are done by student