They described a real fault that they had experienced with an elevator control system and asked how I would go about identifying the root cause. They offered clues about the symptoms encountered. I don't want to be more detailed about the question because I really liked these guys and I suspect this is their favorite interview question. If you are experienced at fault finding and listen to what they are saying you can figure it out.

Preguntas tecnicas relacionadas a sw embebido y protocolos de comunicacion.