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Assertion (A): Serverless is not always cheaper than a continuously running instance.
Reason (R): At high and steady utilisation the per-invocation price exceeds the cost of a reserved instance.

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

Answer: A

Correct answer: Both A and R are true, and R is the correct explanation of A

Both are true and the reason gives the crossover. Serverless bills per invocation and per gigabyte-second, which is very cheap when the function runs occasionally and idles the rest of the time. Under continuous load those charges accumulate past the flat cost of a reserved instance of equivalent capacity. The model suits spiky and unpredictable work, not steady throughput.

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