Design a Space-Efficient Versioned Recipe Shopping Cart
Company: Decagon
Role: Software Engineer
Category: Software Engineering Fundamentals
Difficulty: hard
Interview Round: Technical Screen
Overview: Design a space-efficient versioned shopping cart that aggregates recipe ingredients, evaluates discounts, records every successful mutation, and can check out an earlier version while discarding its future. Compare operation logs, inverse replay, checkpoints, branching semantics, atomic validation, and memory-versus-restore costs.
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