Grokking Modern API Design Interview
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Interview Question: Design a Booking API

The interview question is:

Design a Booking API.

The main challenge is preventing two callers from reserving the same capacity while giving one caller time to complete payment.

An availability read reports capacity; it does not reserve it. A separate temporary hold gives the customer time to pay without allowing abandoned selections to reserve places indefinitely.

The contract needs a temporary promise with an exact expiry. That promise is a resource.

Scope

"I will design discovery of capacity-based slots, temporary holds, booking confirmation that calls the payment service,

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