What are some common causes of memory leaks in Node.js?

Short answer: Global variables holding references. Event listeners not removed. Closures holding onto variables. Caches growing without limits. Security & Best Practices

Real-world example (ShopNest)

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

Say this in the interview

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