advancedReal System Design Problems
Design a Flight Booking System — seat inventory and concurrent reservation across dates.
The seat-inventory-and-concurrent-reservation problem: how seat availability is queried efficiently across many flights and dates, how two users racing to book the last seat on a flight are handled correctly, and how the booking and payment complete as one consistent operation.
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Generate a complete, structured system design answer — requirements, capacity estimation, API design, architecture, database choice, scaling, caching, fault tolerance, security, trade-offs, and more, walked through the way a strong senior engineer would in a real interview.
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