The process took around 4 hours.First round was apti plus technical written.There were 40 questions in technical written and total duration of written was 1.5 hrs . Other two round were technical interview .In first round questions were asked about project .Most questions were related to it...Other technical round was regarding application of subjects I knew.He asked about bootloaders,output of few circuits and microcontrollers.He asked about AVR and ARM.