Hi,

Some of the top Btech exams you can apply in are SRM, BITSAT, JEE MAIN, VIT etc. These are top Btech exams.

Also incase you want to give state level exam then you can apply in AP Eamcet.

If you want to know good Btech colleges in AP for engineering then check this link below: http://www.engineering.careers360.com/colleges/ranking/2016/top-engineering-colleges-in-andhra-pradesh

It has ranking for Btech colleges as well along with what exam you will be required to give.

Hope this helps.

Good Luck.