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Polling (computer science)
&sq=&lang=&file=File:Question_book-new.svg){kind=small} | This article needs additional citations for verification. (January 2015) |
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.
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