Your question is Design a Real-Time Meal Order Ranker. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
You are building a system that processes meal orders as they happen in a food marketplace. The product needs to decide what meals to show, prioritize, and update in real time as inventory, delivery windows, and user behavior change.
How would you design a system for processing meal orders in real-time?