Exam-style question
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What is an interrupt service routine (ISR)?.
- A.A routine that services an interrupt
- B.A routine that permanently stores every program instruction
- C.A routine that controls the processor's clock frequency
- D.A routine that translates source code into machine code
Model answer
What a good answer should say
- A routine that services an interrupt
Explanation
Why this works
An ISR is the routine executed by the processor to deal with the event that caused the interrupt.
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