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The default port for MongoDB is 27017.

updateOne() updates a single document in a collection.

The timers module provides setTimeout and setInterval functionality.

The perf_hooks module provides performance measurement APIs.

fs.watch() watches for changes to a file in Node.js.

os.totalmem() returns the total system memory in bytes.

fs.rename() renames a file in Node.js.

os.platform() returns the operating system platform.

The data event is emitted when a stream has data to read.

The vm module executes JavaScript code in a sandboxed environment.

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