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The worst-case execution time of a task is

  • A.the longest processor time it can need, uninterrupted
  • B.the longest time from its release to its completion in the real system
  • C.the average processor time it needs over many runs
  • D.the interval at which it is released for execution

Answer: A

It is the task's own demand with the processor entirely to itself, and it is the input to every schedulability test. The time from release to completion in the presence of other tasks is the response time, which is what the analysis computes.

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