Hi Shoyab aktar,

B.Tech is a undergraduate academic degree offer in India
And it is a generally a 4 year's course  and you show join after completion of 12th class
And some branches in BTech like

Computer Science and Engineering.

Information Technology.

Electronics and Communication Engineering.

Electrical Engineering.

Mechanical Engineering.

Civil Engineering.

Petroleum Engineering.

Chemical Engineering.

And for more information you can go though in this link

https://www.google.com/search?q=how+can+i+know+information+about+btech+coures

Best of luck

Thank you!!:)

Check out the website of any college or university and go to their department section.There you can find all the branches offered by that college,the faculties and also the syllabus(minors and credit per subejct). Check ou IIT Bombay's Academic Division-http://www.iitb.ac.in/en/education/academic-divisions 

I hope you got my point.Feel free to ask more questions on this platform.