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Implement debounced autocomplete component

CoinbaseSoftware Engineer · Technical Screen
MediumSoftware EngineerTechnical ScreenSoftware Engineering Fundamentals

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This interview question evaluates requirements, scale assumptions, API/data design, architecture, trade-offs, failure modes, and rollout in a realistic interview setting. A strong answer for Implement debounced autocomplete component states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.

Question

Implement an input autocomplete component that supports: debounced user input handling, asynchronous fetch of suggestions, rendering results, keyboard navigation (↑/↓ to move selection), highlighting the active suggestion, and submission on Enter.