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An ARM system fails to resume normal execution after an exception. What is the most likely cause?

medium📝 Analysis Q14 of 15
ARM Architecture - Exception and Interrupt Model
An ARM system fails to resume normal execution after an exception. What is the most likely cause?
AThe interrupt was ignored by the processor
BThe processor speed was increased too much
CThe hardware event was not generated
DThe processor state was not saved correctly before handling the exception
Step-by-Step Solution
Solution:

  1. Step 1: Analyze why resuming normal execution fails

    If the processor cannot resume, it likely lost the information about where to continue.

  2. Step 2: Identify the cause related to state saving

    Not saving the processor state correctly means it cannot return to the interrupted task.

  3. Final Answer:

    The processor state was not saved correctly before handling the exception -> Option D

  4. Quick Check:

    Incorrect state save causes resume failure [OK]
Quick Trick: Resume fails if state not saved properly [OK]
Common Mistakes:
  • Blaming processor speed changes
  • Thinking ignoring interrupt causes resume failure
  • Assuming hardware event absence causes resume failure

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