For m. Tech I need to write pgcet exam in ap for ECE branch in engineering
For MTech you need to appea for PGCET and the preparation requires solvibg all question papers from previous years to understand pattern and how questions hav ebeen aksed .
You can check syllabus and questions papers for practice below::-
https://www.google.co.in/amp/s/engineering.careers360.com/articles/karnataka-pgcet-sample-papers%3famp
To get the list of books and preparing methods check below:-
https://engineering.careers360.com/download/ebooks/ap-pgecet-complete-guide