How does JavaScript handle asynchronous operations?

JavaScript handles asynchronous operations primarily through the use of callback functions. In this context, a callback function is a function that is passed as an argument to another function and is executed after a certain operation has completed. This mechanism allows JavaScript to perform non-blocking operations, meaning that while a task such as fetching data from a server is being completed, the rest of the code can continue to execute without waiting for that task to finish.

When an asynchronous operation is initiated, such as an API call or a timer, JavaScript can continue executing the remaining lines of code. Once the operation is completed, the callback function is invoked, allowing you to handle the result of that operation succinctly and efficiently. This model is especially useful in web development, where blocking the main thread while waiting for long-running tasks would lead to a poor user experience.

Other methods for handling asynchronous code in JavaScript include Promises and Async/Await syntax, but callback functions remain a foundational concept in understanding how JavaScript manages these operations.

The other options do not accurately describe how JavaScript manages asynchronous tasks. Synchronous code implies that tasks must be completed one after the other, which is contrary to the nature of asynchronous execution. Delaying execution does not reflect the model used in