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Which of the following is an aperiodic task requesting the processor at unpredictable times?

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Which of the following is an aperiodic task requesting the processor at unpredictable times?

(a) job

(b) aperiodic task

(c) sporadic

(d) periodic task

This question was addressed to me in an interview.

My question is from Classification of Scheduling Algorithms in chapter Embedded Operating System, Middleware and Scheduling of Embedded Systems

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Correct option is (c) sporadic

Easiest explanation: The aperiodic tasks request the processor at unpredictable times if and only if there is a minimum separation between the times at which they request the processor which is called sporadic.

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