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Which of the following correctly represents the priority order in ARM exception levels from highest to lowest?

easy📝 Factual Q12 of 15
ARM Architecture - Exception and Interrupt Model
Which of the following correctly represents the priority order in ARM exception levels from highest to lowest?
A3, 2, 1, 0
B0, 1, 2, 3
C1, 0, 3, 2
D2, 3, 0, 1
Step-by-Step Solution
Solution:

  1. Step 1: Recall ARM priority numbering

    Lower numbers indicate higher priority, so priority order starts from 0 upwards.

  2. Step 2: Arrange numbers from lowest to highest

    The correct order from highest to lowest priority is 0, 1, 2, 3.

  3. Final Answer:

    0, 1, 2, 3 -> Option B

  4. Quick Check:

    Priority order = 0 to 3 [OK]
Quick Trick: Priority order counts up from 0 as highest [OK]
Common Mistakes:
  • Reversing the order thinking higher numbers are higher priority
  • Mixing up the sequence of numbers
  • Assuming priority starts at 1 instead of 0

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