The interview process is generally very smooth. Ideally for AMTS they hire from college, but there can be exceptions. Ideally questions are more on concepts and understanding.
The questions were mostly of DSA, OOPS, OS and DBMS, Like From DSA it was to implement merge sort and Sliding window question
From OOPS it was related to Paging and Multithreading basic theory questions and finally from DBMS it was related to normalisation and joins.
The interview process is generally very smooth and if your concepts are very clear you should be able to make it.