Got a call from hr through naukri. The process took 1 day , 1 written round 4 technical rounds. Written round has 3 questions based on linked lists, Graphs and regular expression, The first and second rounds are completely based on Data structures, Third round asked about process thread , OS concepts and again on heaps ,priority Queues. Fourth round is managerial round based previous work done, Networks, various other questions and again Data structures.