Design a scalable news feed system.\n\n* How do you define your minimum viable product? \n* What data to collect from users? How to customerize news for each user? What\'s state \'0\' recommendations?\n* What machine learning techniques would be involved? Do you train an individual model for each user?\n* How to ensure the scalability, knowing that the user base may grow from millions to billions (like Facebook today)? What are the challenges that you can think of?\n

Design a scalable news feed system.\n\n How do you define your minimum viable product? \n What data to collect from users? How to customerize news for each user