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Assertion (A): Auto scaling should be triggered on a leading rather than a lagging indicator where possible.
Reason (R): New capacity takes time to become useful, so waiting for saturation is too late.

  • A.A is false but R is true
  • B.Both A and R are true, and R is the correct explanation of A
  • C.Both A and R are true, but R is not the correct explanation of A
  • D.A is true but R is false

Answer: B

Both are true and the reason gives the timing problem, and queue depth or request rate often lead processor saturation by exactly the interval needed. Choosing the metric well matters more than tuning the thresholds around it.

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