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What is clustering in Node.js?

Q: What is clustering in Node.js?

Short answer: Node.js runs on a single thread by default, which means it can handle only one operation at a time per process. Clustering allows you to create multiple Node.js processes (workers) that share the same server port. This way, your app can utilize multiple CPU cores and handle more requests concurrently. 📌 Example: Using the built-in cluster module, you can fork multiple workers. Real-world example (ShopNest) A ShopNest BFF in Node.js aggregates catalog and price APIs for the React storefront. Say this in the interview Define — one clear sentence (the short answer above). Example — relate it to a project like ShopNest or your real work. Trade-off — when you would not use it.

Short answer: Node.js runs on a single thread by default, which means it can handle only one operation at a time per process. Clustering allows you to create multiple Node.js processes (workers) that share the same server port. This way, your app can utilize multiple CPU cores and handle more requests concurrently. 📌 Example: Using the built-in cluster module, you can fork multiple workers.

Real-world example (ShopNest)

A ShopNest BFF in Node.js aggregates catalog and price APIs for the React storefront.

Say this in the interview

Define — one clear sentence (the short answer above).
Example — relate it to a project like ShopNest or your real work.
Trade-off — when you would not use it.

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