Explain what a queue data structure is and how it works.

A queue is a data structure that operates on the FIFO (First In, First Out) principle, meaning the first entered element will be the first to be removed. Imagine a queue in a store: the first person to arrive is the first to be served.

Main operations:

• enqueue — adding an element to the end of the queue;
• dequeue — removing and retrieving an element from the front of the queue;
• peek/front — viewing the first element without removing it.

In Node.js, a queue is often used to manage asynchronous tasks to process them sequentially.