Round 1:Well Round 1 was online aptitude test on AMCAT platform and i suggest you too not to waste much time in verbal section, and AMCAT test is cut off test i.e.section wise cutoff
Round 2:After clearing the online test, next is technical interview which depends on panel.If you are lucky the technical round will be same like HR round and make sure to have a knowledge of basic concepts and projects.
Round 3:HR interview which is normal.They just ensure that you will be OK with relocation and say yes to whatever they say.Visit company website once, it will surely help you