The answer
Promise callbacks are placed in the Microtask Queue, while timer and I/O callbacks are placed in the Callback Queue. The Microtask Queue has higher priority.
What Is Event Loop in Node.js?
What is the difference between the Callback Queue and Microtask Queue?
More FAQs in What Is Event Loop in Node.js?
The Event Loop is a mechanism that manages asynchronous operations by moving completed tasks to the Call Stack when JavaScript is ready to execute them.
The Event Loop allows Node.js to perform non-blocking operations and efficiently handle many concurrent requests.
JavaScript execution in Node.js is single-threaded, but asynchronous operations are handled outside the Call Stack using Node.js APIs and the Event Loop.
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