Multiple choice

The unique signal generated by a device that tells the operating system that it is in need of immediate attention is called an

  1. action

  2. event

  3. interrupt

  4. activity
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C Correct answer
Explanation

An interrupt is a hardware signal sent to the CPU that indicates a device needs immediate attention, causing the CPU to suspend its current operations and handle the request. Events and activities are broader concepts, while an action is a general term for something that happens - none specifically describe this hardware signaling mechanism.

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