Discussion
An engineer reports a task set of utilisation 1.4 as schedulable under earliest deadline first. The proper response is
Answer: C
Correct answer: the set demands more processor than exists and cannot be scheduled
A utilisation of 1.4 means the work requires forty per cent more processor time than the hardware provides, and no algorithm can create it. Earliest deadline first is optimal, but optimality means it succeeds whenever success is possible - and here it is not.
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