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Assertion: introducing a kernel makes a system's timing easier to analyse. Reason: a fixed priority preemptive kernel admits a published schedulability test.

  • A.both the assertion and the reason are true but the reason does not explain the assertion
  • B.the assertion is true but the reason given for it is false
  • C.the assertion is false although the reason offered is a true statement in itself
  • D.both the assertion and the reason are true and the reason explains the assertion

Answer: D

The whole value of the standard priority model is that a task set's schedulability can be decided by calculation rather than by testing, which a hand-written loop cannot offer. That analysability is exactly why the analysis becomes easier.

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