B.Tech

In BCA entrance exams, questions are from IT field generally.
There are also questions from Maths, English, GS stream.
Good luck.

It totally depends on what type of degree programme the college is offering. If the college is offering BE degree, then all the branches would under BE and vice-versa.

Hello,
Don't worry much about the exam admit card, it comes on time or it may be quite late. So, you continue your study. Admit card is released 10 to 15 days before the exam.

You can go for any stream in B.Tech through lateral entry. But my opinion is to choose the branch, which was in your Diploma. It will be beneficial for you.

Assuming you belong to general category, you really don't have much options. You won't get anything out of JOSSA, so I would suggest you to explore your other options such as other entrance exams, such as BITSAT VITEE, SRM to get a seat in decent private college. All the best.

If you have a valid reason, it's completely fine. You just don't need to give up. It is no shame to fail, just come back stronger next time, when you get the chance. If you do well in your graduation, I don't think it would be an issue. All the best.

Depends on your knack actually. If bioscience interests you, which includes the entire spectrum of organisms, then biotech is the way. But, you need to have your basics in organic chemistry crystal clear. Biotech would be tough otherwise. I assume, you are a class 12th student, so take up biotech on