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Assertion (A): Raising a function's memory can sometimes reduce its total cost.
Reason (R): The function completes proportionately faster because processor share rises with memory.

  • 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 mechanism, and the outcome depends on whether the work is actually processor bound. A function waiting on a network call gains nothing from the extra capacity and simply costs more.

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