Dear Ritesh, for both BCA and B.Tech  the eligibility criteria remains +2. So if you want to join B.Tech, you have to write the entrance examinations for admission into B.Tech collges. You needn't necessarily completr BCA to join B.Tech. You will need to reach out to your college authorities once you secure a seat in B.Tech so that they can isdues you your TC. 

Hello Ritesh,

Yes, you can leave the course of BCA and go for BTech. There won't be a problem. But I suggest you continue with your BCA course and prepare for the engineering entrance exams and then after getting a BTech college you can leave BCA and join BTech course.

No money will be refunded though.