Interrupts and interrupt handling
Hardware signals causing processor to pause execution and service requests. Interrupts enable responsive device handling. Interrupt vectors direct to appropriate handlers.
Real World
When you press a key on your keyboard, the keyboard controller sends a hardware interrupt to the CPU, which pauses Spotify playback processing just long enough to register the keystroke before resuming.
Exam Focus
List the full interrupt sequence: save context, identify source via vector, execute ISR, restore context, resume.
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