Polling (computer science)

Polling, or interrogation, refers to actively sampling the status of an external device by a client program as a synchronous activity. Polling is most often used in terms of input/output (I/O), and is also referred to as polled I/O or software-driven I/O. A good example of hardware implementation is a watchdog timer.

This article is about the computer science term. For the mathematical model, see Polling system. For other uses, see Polling (disambiguation).
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