Bca students can apply for b.tech in cs branch
A BCA graduate is a software programmer armed with the knowledge of scripting as well as programming languages like C, C++, Java, HTML, PHP etc. whereas BTech graduate has detailed knowledge of both hardware and software. Tech. is a four-year undergraduate program; BCA is a three-year undergraduate program.
so there is no use of opting for BTech in CSE after BCA .