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A 1.3.4 Evaluating Polling and Interrupt Handling (SL and HL)

The operating system has to notice when a device needs attention, and it can either keep checking the device (polling) or wait for the device to signal (interrupt handling). Neither is better everywhere, so this lesson works from clear success criteria towards a justified judgement for a stated situation. The command term is evaluate, the most demanding in A1.3. This is the one statement in A1.3 at evaluate. So the...

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