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The utilisation bound for earliest deadline first on one processor is

  • A.1.000
  • B.0.693
  • C.0.828
  • D.0.500

Answer: A

Any task set with deadlines equal to periods and a utilisation at or below unity is schedulable, which is the whole attraction of the algorithm. The price is more run-time bookkeeping and much worse behaviour when the system is momentarily overloaded.

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