Design an online shopping domain model covering the product catalog, SKU inventory, shopping cart, order lines with snapshotted prices, a checkout flow, a payment boundary, and shipment state transitions.
Design an online shopping system: customers browse a catalog, add items to a cart, and check out to create an order that is paid for and shipped. Focus on the domain model — products, SKUs and inventory, cart, order with line-item prices, checkout, payment, and shipment. Start by clarifying scope and the core objects.
Work in the provided coding workspace while explaining your decisions to the live interviewer. Validation may use inline tests, examples, comments, or a verbal walkthrough.
Practice this problem in the live coding workspace while the interviewer probes your clarification, implementation, trade-offs, and validation.
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