Amazon Machine Learning interview questions

First I had to complete a homework exercise within 7 days. This consists on a practical machine learning exercise. I had to build a model to predict how much a house will sell for. The goal was not to build state of the art model ani asked them about the d they did not test whether the model performs poorly or not. After one month approximately I asked them update about my application and they set up a technical telephone interview. The interview aim was to establish my knowledge of ML. They asked me how I would have solved a problem using Machine Learning techniques.