In the Windows operating systems, almost all low-level I/O operations are asynchronous.

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Quizplus · Accepted Answer

Windows operating systems support asynchronous I/O operations through the use of non-blocking I/O functions, completion routines, and I/O notification mechanisms, such as I/O completion ports. This allows for efficient I/O processing without blocking the application, resulting in better performance and resource utilization.

In the Windows Operating Systems, Almost All Low-Level I/O Operations