Indeed interview questions

- first round: coding interview, write code in white board, may like leetcode easy~medium level - second round: about how to use machine learning algorithm to solve real problem. It was a problem about how to sent email to potential candidates and how to make the use of response email from candidates - third round: statistics question, some easy probability questions - fouth round: write code in pc to solve a data analysis question using python and packages like panda, numpy, scikit-learn and etc.