It was a 3 step process-1) OA 2) Technical Round 3) HR round. The oa consisted of aptitude and coding questions of simple-medium level difficulty. The technical round was easy. There were questions from oops concept and dbms. They also asked few questions from my projects. For the dsa, they asked me 2 simple questions-sort 0,1,2 and LRU cache. Then, in the HR round, there were normal behavioural questions like tell me about conflicts u have faced, disagreements, any academic failure, strengths and weeknesses and why do u want to join amex.