How are I/O operations, like reading from the file system or network requests, handled by the Event Loop in a non-blocking manner?

They are offloaded to worker threads for processing.
They are executed sequentially in the main thread.
They are delegated to external libraries to handle asynchronously.
They are executed concurrently in the main thread using callbacks.

In Node.js, I/O operations are handled by the Event Loop in a non-blocking manner by executing them concurrently in the main thread using callbacks. When an I/O operation is initiated, Node.js registers a callback function to be executed once the operation is complete, allowing the main thread to continue processing other tasks in the meantime.

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