It was a pretty easy first round. Involved basic aptitude and English language test The second round was a GD. Topics were quite random and mostly about current affairs The third round was a technical round where they question interesting candidates for more than an hour. I myself was in there for 90 mins approx, but did feel like that at all. My reviewer was a really friendly guy who asked me many technical questions and also a lot of puzzles to test your problem-solving skills. The last round was an HR round, They asked me to solve some questions there too and after that, the entire process ended by around 8 pm. It was a campus drive, so the process might vary if the application is through other means.