Explain blocking and non-blocking behavior in Node.js.

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Blocking behavior in Node.js refers to code that stops the execution of the program until a particular task is completed, while non-blocking behavior allows the program to continue executing other tasks without waiting for the current task to finish.

Blocking behavior can lead to slower performance as the program waits for I/O operations to complete before moving on to the next task.
Non-blocking behavior is more efficient as it allows the program to handle multiple tasks simultaneously, improving overall performance.
Node.js uses an event-driven, non-blocking I/O model which allows for asynchronous operations to be handled efficiently.
Example: Using callbacks or Promises in Node.js to handle asynchronous tasks without blocking the main thread.

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Explain blocking and non-blocking behavior in Node.js.

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