EY MERN Stack Mid

Explain useState and useEffect with a real example.

useState holds UI state; useEffect runs side effects after paint. ShopNest cart badge: const [count,setCount]=useState(0); useEffect loads cart count once on mount.

EY rounds often probe: Client scenarios.

Themes commonly reported in public MNC interview experiences (AmbitionBox / LinkedIn / Glassdoor-style). Practice aloud; keep answers this short in the real round.

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