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Consider this AWS Auto Scaling group with a cooldown period of 180 seconds. If a scale-out event happens at 12:00:00 and another scale-out event triggers at 12:02:00, what will happen?

medium📝 Predict Output Q13 of 15
AWS - Auto Scaling
Consider this AWS Auto Scaling group with a cooldown period of 180 seconds. If a scale-out event happens at 12:00:00 and another scale-out event triggers at 12:02:00, what will happen?
AThe second scale-out will be ignored because cooldown is active
BThe second scale-out will proceed because cooldown ended
CBoth scale-outs happen simultaneously
DThe cooldown period resets to 180 seconds at 12:02:00
Step-by-Step Solution
Solution:
  1. Step 1: Calculate cooldown end time

    Cooldown starts at 12:00:00 and lasts 180 seconds (3 minutes), so ends at 12:03:00.
  2. Step 2: Compare second event time with cooldown

    The second event at 12:02:00 is before cooldown ends, so it should be ignored.
  3. Step 3: Re-examine options carefully

    The second scale-out will be ignored because cooldown is active says second scale-out ignored, but cooldown is active until 12:03:00, so correct.
  4. Final Answer:

    The second scale-out will be ignored because cooldown is active -> Option A
  5. Quick Check:

    Cooldown active = ignore scale-out [OK]
Quick Trick: Cooldown blocks actions until time ends [OK]
Common Mistakes:
  • Assuming cooldown ends before 180 seconds
  • Thinking cooldown resets on new event
  • Believing multiple scale-outs happen simultaneously

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