What are global objects in Node.js?

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Global objects are objects and variables available everywhere in a Node.js application without needing to import them. They're part of Node's runtime environment, similar to how window works in the browser. Common global objects: global — the global namespace itself (equivalent to window in browsers). process — info about the current Node process (env variables, arguments, exit handling). console — logging ( console.log , console.error , etc.). Buffer — handles binary data. __dirname — absolute path of the current module's directory. __filename — absolute path of the current file. setTimeout / setInterval / setImmediate — timers. clearTimeout / clearInterval / clearImmediate — cancel timers. require (CommonJS) / module / exports — module system. queueMicrotask — schedule microtasks. Mention that __dirname and __filename look global but are actually module-scoped. This detail shows you understand how the Node.js module wrapper works.