An interrupt is when a computer "pauses its current task to handle something important, then resumes the original task afterward." Simply put, it’s like someone saying, "Wait! Do this first!"
How does an interrupt work?
- The computer is working: For example, the computer is copying a file.
- An interrupt occurs: Imagine a printer sends a request saying, "I’m out of paper!"
- The CPU pauses and checks: The CPU temporarily stops the file copying and checks the printer’s request.
- Handle the request: The CPU processes the request, such as showing a message to refill the paper tray.
- Resume the original task: After handling the request, the CPU goes back to copying the file.
Why are interrupts necessary?
- Prioritize important tasks: While the computer can do multiple tasks at once, sometimes urgent requests need immediate attention. Interrupts allow this to happen.
- Efficient processing: The computer can handle small issues right away, making it run more efficiently.
In summary, interrupts help the computer handle important requests immediately without delaying them.
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