B.Tech

If you are eligible for B.Tech, then you should definitely go for B.Tech as the salary range of a B.Tech graduate is more than as compared to BCA graduate. If not then BCA is also a great way of entering into the IT Industry. Both degree courses will allow you to work in IT Sector. BCA is intended for those candidates who wants to work in software field and whereas B.Tech is for both fields software and hardware. If you want to learn programming languages which you will be studying in your BCA course then you can check out this app which is specially designed and developed for BCA students. It has programs and assignments of languages like C, C+ and Java with their outputs. You'll be studying these languages in your 3 years of BCA.

I really don't have any idea about comparison. But, I can give you information about scope of B.Tech in dairy technology. Being a Dairy Technologist (B.Tech- NDRI, Karnal) myself, I can clearly tell you that it has a very good scope. Even better than any other engineering. This industry will never run out of jobs and opportunities, plus you always have an option to go for higher studies if you are not interested in a job after B.Tech. But, as is the case of all other B.Tech degrees, where you do it from always matters. One other important factor is fees. Here you don't spend Lacs of rupees as fees, so it does not create a burden on you or your parents. Talking about getting a decent job, it always depends on you how well you are with academics and how much knowledge you have about your subject. I understand even after having these capabilities you need a platform. NDRI, for example, has a dedicated placement cell. And no one for that matter stays without a job. Starting salaries are either equivalent to or in some cases more than what other engineers might get. I hope this will help you. Regards.