The first round is for checking problem solving ability. It will contain some 10 questions and no negative marks. The second round is coding. The questions for coding may differ for developers and testers. The third round is technical. The fourth round is again technical. The fifth round is with HR

There are 100 bulbs lined up in a room. All are turned on in the first pass. Then all the even numbered light bulbs are switched off. After that, every third bulb is switched on. Then all those bulbs that were switched off are turned back on and all those that were lit are turned off. Then the same process is being carried with the fourth bulb and the fifth bulb.