What types of coroutine dispatchers do you know and how do they work?

In Kotlin, there are several main types of dispatchers for coroutines, which determine on which thread or thread pool the coroutine will run:

• Dispatchers.Main — used for UI thread work on Android. All UI updates should be done here.
• Dispatchers.IO — optimized for IO operations like file, network, or database access. Uses a thread pool that can expand as needed.
• Dispatchers.Default — designed for CPU-intensive tasks, such as complex calculations. Uses a thread pool with a size based on the number of CPU cores.
• Dispatchers.Unconfined — starts the coroutine in the current thread until the first suspension, then continues in the thread where it was resumed. Rarely used, for example, in testing.

Example usage:

GlobalScope.launch(Dispatchers.IO) {
    val data = fetchDataFromNetwork()
    withContext(Dispatchers.Main) {
        updateUI(data)
    }
}