Question

Which of the task are not periodic?

(a) periodic task

(b) unpredictable task

(c) aperiodic task

(d) job

This question was posed to me in an international level competition.

This intriguing question comes from Classification of Scheduling Algorithms topic in portion Embedded Operating System, Middleware and Scheduling of Embedded Systems

Answer 1

The correct choice is (c) aperiodic task

To explain I would say: The aperiodic task is the one in which the task is not periodic but the periodic task is the one in which are the task are periodic. Each execution of a periodic task is known as the job.