When would you not use Redux?
For small apps, mostly UI state, form state, simple data fetching, or shallow prop drilling. Redux is for genuinely shared, complex state; otherwise local state or Context is better and simpler.
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More FAQs in Redux and State Management Interview Questions for React
Redux is a state management library with a single store, actions, and reducers. Use it for complex, shared state across many components where Context causes too many re-renders or becomes unmanageable.
An action is dispatched, the store runs the relevant reducer, the reducer returns new state, and the new state flows to components via useSelector. It is a strict one-way flow that makes state updates predictable.
Because Redux relies on predictable, reproducible state updates for features like time-travel debugging. A pure reducer takes state and an action and returns new state with no side effects, so the same input always produces the same output.
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