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A task with a period of 10 ms and an execution time of 3 ms has a utilisation of

  • A.13.0
  • B.0.30
  • C.3.33
  • D.0.03

Answer: B

Correct answer: 0.30

\[ \frac{3}{10} = 0.30. \] The task requires 30 per cent of the processor, leaving 70 per cent for everything else. Utilisation is dimensionless, so an answer of 3.33 or 13 has confused the ratio with a rate or a sum.

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