Hello there

Firstly I want to tell you that you can do your Masters course after completing  bachelor's degree and in yours case as you have done with your BTech which is a bachelor degree then you can do MCA which is a professional master degree.

But if I suggest you one thing that is after doing btech doing MCA is of no use. As you have done already a 4 years course then it doesn't make any sense to do a 3 year course because they both are equivalent at that stage. It's better to go for your Mtech and after that you will be getting numerous jobs in the field of food Industry. But if you want to do MCA then it's totally your choice but I would not recommend you and even no one would recommend.

I hope it helps you!

Thank you!