You can refer to the courses mentioned in the answers of the following link -
https://www.careers360.com/question-i-am-doing-my12th-in-andhra-pradesh-which-college-will-choose-my-btech

There are many entrance exams for B.tech program.

There are National level exam, State level exam and Private level exam.

Can you please specify the name of the exam you want to know?

You can also check the dates of all entrance exam for engineering from the given below link
https://engineering.careers360.com/exams

Good luck!!