Node.js Core Modules Explained: path, os & events | MERN Backend Part 4

Published: 22 July 2026
on channel: Knowledge Factory 22

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Welcome to Part 4 of the Complete Node.js Backend Course by Knowledge Factory 22! 🚀

To build scalable and production-ready applications, you must master the built-in power tools of Node.js. In this practical tutorial, we dive deep into Node.js Core Modules without any boring theory! We will explore how to interact with the operating system, manage file paths across different environments, and build custom event-driven architectures.

If you are preparing for Web Developer interviews or want to become a successful MERN Stack Developer, understanding core modules is an absolute must!

📘 What you will master in this video:

What are Core Modules? Understanding built-in tools that don't require external NPM installations.

The path Module: How to safely join and manipulate file/folder paths across Windows, Linux, and macOS using path.join().

The os Module: How to extract critical system information like OS type, platform, free memory, and system uptime for server monitoring.

The events Module: A deep dive into the Event-Driven Architecture of Node.js. Learn how to create, trigger (emit), and listen to (on) custom events using the EventEmitter class.

Real-Life Mini Project: Building a practical file-download logging system using the fs and events modules together!

🔥 PRACTICE TASKS (Drop your results in the comments!):

Use the path module to extract the name and extension of a file.

Log your current system memory and platform using the os module.

Create a custom event called userDeleted and print a goodbye message.

📝 FREE Premium Code Notes & Blogs:
Get the exact source code, FAQ comparisons, and interview tips used in this video on my Hashnode blog: https://codeswithpayal.hashnode.dev/

🔗 Important Links:
👉 Full Node.js Backend Course Playlist: • Node.js File Handling in 1 Shot 🔥 | fs Mod...
📌 Join the Community on Telegram for Source Code: https://t.me/knowledgefactory_22

⏳ Video Chapters (Timestamps for Quick Revision):
0:00 - Introduction to Node.js Core Modules
0:22 - The path Module: Handling File Paths
3:42 - Introduction to Events and the EventEmitter Class
4:25 - Setting up the Events module
6:17 - Using the .on() Method
12:18 - Using the .emit() Method
13:58 - Troubleshooting: Understanding TypeError and Instances
20:58 - Real-Life Mini Project: File-Download Logging System
25:44 - FAQ Section: Addressing Common Doubts
28:59 - Final Practice Tasks

Don't forget to Subscribe to Knowledge Factory 22 and hit the bell icon to master backend development!

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