First round was totally based on aptitute based on the first round they selected for second round i.e. one on one interview, this round was totally based on your resume they asked me some puzzles and then third round was HR round

The whole process took 2 months. First, the application platform is a pain to work with, shares users with internal platform, shares resume and motivation letter across applications... Interviews : one with each team you might be working with, then a final one with an HR rep. They won't be asking very technical questions, more about your curriculum and previous experiences. The process was excruciatingly long (almost 2 weeks between each interview), the HR dept seems unable to set appointments at the time slots you specified them, and always calls, even when you ask them not to. I needed to ask them several times to get updates, and they never answer at the time they promise you. Overall, I don't feel much respect towards future interns.