Crown Equipment Software Engineer interview questions

It was a 15 minute phone call where the hiring manager asked for my experience then asked me only one question. I'm still perplexed how someone could derive much from a single call like that...

Multiple telephonic rounds with technical questions related to autonomous navigation and probabilistic robotics. Then I has an onsite interview about conceptual underpinnings of probabilistic robotics related to navigation of ground vehicles. mathematical ideas and software implementations of the same are important, specially the commercially viable ones. Multiple rounds of onsite interviews with different teams and different areas of interest.