Which of the following best describes a JavaScript callback function?
- A function passed as an argument to another function and executed later
- A function used to display pop-up messages
- A function that runs immediately after it's defined
- A function that loops through an array
A JavaScript callback function is a function that is passed as an argument to another function and is executed later, often after the completion of an asynchronous operation. It's a fundamental concept for handling asynchronous tasks and allows for flexible and event-driven programming.
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