ReactJS Interview Q: What is useCallback? 🔍

ReactJS Interview Question #1 – What is useCallback hook in React and when should you use it?

useCallback helps optimize performance by memoizing callback functions so they're not recreated on every render.
Best used when passing callbacks to child components that rely on referential equality.

Example covered: useCallback vs normal function inside component
React Hooks | React Interview Tips | Frontend Interview Prep

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