Your question is Restaurant System Design. 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).
Design a restaurant system.
Clarify the scope, then design an end-to-end system for discovering restaurants, retrieving and ranking suitable options, checking availability, and completing reservations. Discuss scale assumptions, online versus batch components, consistency, latency, evaluation, monitoring, and failure handling.