What happens to the Event Loop when the callback queue and the task queue are both not empty?

  • It suspends the Event Loop until both queues are empty.
  • It processes callbacks from the callback queue before tasks from the task queue.
  • It processes tasks from the task queue before callbacks from the callback queue.
  • It randomly selects items to process from both queues.
When both the callback queue and the task queue are not empty, the Event Loop in Node.js follows a specific order. It first processes callbacks from the callback queue before moving to tasks from the task queue. This order ensures that callback functions, which often include I/O operations, are handled promptly.
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