Nodejs Tutorial 20: Module Caching | Advanced Nodejs

Published: 21 March 2026
on channel: Code for Interview

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Learn Module Caching in Node.js and understand why a module executes only once, even when require() is called multiple times. In this tutorial, you'll explore how Node.js caches modules internally, improves application performance, and how to clear the cache when needed.

This is an important concept for Node.js interviews, backend development, and building scalable applications.

📚 Topics Covered

✅ What is Module Caching?
✅ How require() works internally
✅ Why modules execute only once
✅ require.cache explained
✅ Clearing Module Cache
✅ Requiring the same module multiple times
✅ Module Caching Interview Questions
✅ Best Practices

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🔥 Keywords

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