Which algorithm forms the foundation of Amazon's product recommendation system that transformed online retail?

Amazon's recommendation system is one of the most sophisticated in retail, driving up to 35% of their revenue. But do you know what powers their 'Customers who bought this also bought...' feature? Test your knowledge about the technology behind personalized shopping experiences that have revolutionized e-commerce and changed how we discover products.

This is a live public trivia poll on AIPolls.Net. Vote and see real-time results.

Item-to-Item Collaborative Filtering
Random Forest Regression
K-Nearest Neighbors Classification
Neural Network Deep Learning