🧒 Explain like I'm 5
A child's personal toys are kept in their room (local state). Toys that the whole family uses are stored in the living room (context). A large inventory that needs careful management requires hiring a warehouse manager (Redux/Zustand). Borrowed items from an external library (API data) need a tracking system for return dates and renewals — that is server state, and it should not be mixed with household items.
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Senior-level deep dive: internals, pitfalls, and a self-interview ladder.
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