Cisco Software Developer interview questions

They send me a coding challenge and let me to send back my code. The question is about finding the path in graph. It was essential but not that hard once you get to know what they ask you to do

Multiple choice questions, written test around 40 questions i think. Some aptitude questions, c programming, networking based questions. 3 rounds face to face technical interviews. Each round took mostly around an hour. HR round just to discuss about company culture.