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Assertion (A): Durability and availability are quoted as separate figures.
Reason (R): One concerns whether the data still exists and the other whether it can be reached at this moment.

  • 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 distinction, and a service may lose availability for an hour without any risk at all to the durability of what it holds. Both are quoted as nines. Neither figure implies the other at all.

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