useCallback vs useMemo Hook in React | Optimization Technique in React | React Interview Preparation

Are you confused about useCallback and useMemo in React?
Do you know when to use which hook and why interviewers ask this so often?

In this video, we explain useCallback vs useMemo clearly, deeply, and from an interview + performance perspective ⚛️

📌 In this video, you’ll learn:
✅ What is memoization in React
✅ What is useCallback
✅ What is useMemo
✅ Difference between useCallback and useMemo
✅ Why these hooks were introduced
✅ How they work internally
✅ Function reference vs value memoization
✅ When to use useCallback
✅ When to use useMemo
✅ Common mistakes developers make
✅ Interview tips & real‑world examples

📌 This is Episode 19 of the React Interview Preparation Series by Fullstack Diaries, focused on React internals, performance optimization, and interview‑ready concepts.

👨‍💻 Perfect for:
• React beginners
• Frontend developers
• React / Frontend interview preparation

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💬 Comment: Which one confused you more — useCallback or useMemo?

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Видео useCallback vs useMemo Hook in React | Optimization Technique in React | React Interview Preparation канала Fullstack Diaries