The article discusses two crucial global objects in Node.js: `process` and `console`. The `process` object provides information about the application's process, including its ID, memory usage, and environment variables, while the `console` object allows for logging messages to the terminal or console with various methods. Mastering these objects can improve development skills by efficiently managing processes and memory, handling errors, and optimizing app performance.
Variable shadowing in JavaScript occurs when an inner variable hides an outer one with the same name, leading to unexpected behavior and making code harder to debug. Understanding scoping rules can help avoid it. Best practices include using unique names, avoiding global variables, and being mindful of scope.
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