Core Concepts: What is Node.js, and how does it differ from traditional server-side technologies? Event Loop: Can you explain the Node.js event loop and how it handles asynchronous operations? Modules: How do you handle modules in Node.js? Provide examples of how to import and export modules. File System: How would you read and write files in Node.js? Provide an example using the fs module. JWT Basics: What is JWT (JSON Web Token), and how does it work? Explain its structure. Token Generation: How do you generate a JWT in a Node.js application? Provide an example. Token Validation: How do you validate a JWT in an Express.js application? Provide an example of a middleware for protecting routes.
