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