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Polling
Polling Polling is a method used in computer systems to request and receive data from external devices or users. It involves a program repeatedly sending a...
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Polling Polling is a method used in computer systems to request and receive data from external devices or users. It involves a program repeatedly sending a...
Polling
Polling is a method used in computer systems to request and receive data from external devices or users. It involves a program repeatedly sending a control signal to a peripheral device or user, requesting specific data or input. Once the peripheral device responds with the requested information, the control signal is reset, and the process repeats.
Polling can be used for a variety of purposes, including:
Inputting data: The main program can poll a peripheral device to check if data is available for reading.
Responding to events: The program can poll a peripheral device to see if an event has occurred, such as a button press or a disk read.
Transferring data: The program can poll a peripheral device to read or write data.
Polling is a relatively simple technique, but it can be used to provide real-time data to the main program. However, it is important to note that polling can be inefficient, especially for devices that are far away or have limited bandwidth. In these cases, other methods, such as interrupt-based communication, may be more suitable