Your question is High-Level Design for Booking App. 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 doctor appointment booking application (HLD).
Asked in the Architectural round stage.
Clarify the scope before designing, including doctor and patient workflows, appointment discovery, availability management, booking and cancellation behavior, consistency requirements, and whether ML-assisted doctor or slot ranking is in scope.