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Frontend Development · React

How would you answer an interview scenario involving server data fetching and caching in React?

AdvancedUpdated 2026-08-08

For an interview scenario involving server data fetching and caching, I would first clarify the business goal, scale, constraints, and the failure or quality attribute the interviewer wants to explore. Server data fetching retrieves remote application state through APIs, while caching stores reusable responses and tracks freshness, loading, error, and refetch behavior. In this scenario, after updating a customer record, invalidate or update the cached customer query so every screen reads consistent data instead of manually synchronizing several component states. For production, centralize API access, model loading and failure explicitly, cancel obsolete requests, and use a server-state library when caching and invalidation requirements become substantial. I would then explain the main alternatives and tradeoffs, identify likely failure modes, and describe how I would validate the solution through testing, observability, security controls, and recovery or rollback planning.

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