Amazon Machine Learning Engineer - International Search interview questions

Task: 300-d feat vector of sensor data come in every second -- decide whether or not there is a problem. The task was Anomaly Detection. They did not give me any other information but you were allowed and even encouraged to do so. The next Question concerned the type of problems. There are 5 type of problems but we need to identify if there is a new one. The last Question concerned production. What should be shared across the different servers?