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What is WebSocket in Node.js?

WebSocket provides a persistent two-way communication channel between client and server. It is commonly used for real-time applications such as chats, gaming, notifications, and live dashboards. Libraries like Socket.IO simplify WebSocket implementation.

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How would you handle global error boundaries in Express or Node.js backend apps?

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What is Node.js and why is it used?

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What is the difference between Node.js and JavaScript?

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Jeevan Bhargav

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This answer is calibrated for technical interviews. Verify benchmarks in local sandboxes before deploying.