ARM Architecture - Exception and Interrupt Model
Why is handling hardware events via exceptions more efficient than using software polling in ARM systems?
Why is handling hardware events via exceptions more efficient than using software polling in ARM systems?
hard📝 Conceptual Q10 of 15
Step-by-Step Solution
Solution:
Step 1: Understand polling vs exceptions
Polling involves repeatedly checking hardware status, consuming CPU time.Step 2: Efficiency of exceptions
Exceptions interrupt normal flow only when needed, saving CPU resources and improving responsiveness.Final Answer:
Exceptions allow immediate response without wasting CPU cycles on constant checking -> Option AQuick Check:
Exceptions save CPU cycles compared to polling [OK]
Quick Trick: Exceptions save CPU cycles over polling [OK]
Common Mistakes:
- Thinking polling is faster than exceptions
- Assuming exceptions consume more power
- Believing polling removes interrupt vectors
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