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Which of the following is the base for scheduling algorithm?

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Which of the following is the base for scheduling algorithm?

(a) WCET

(b) time

(c) execution time

(d) address accessing time

I got this question in unit test.

Enquiry is from Prediction of Execution Times in portion Embedded Operating System, Middleware and Scheduling of Embedded Systems

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Right answer is (a) WCET

Best explanation: The base for scheduling algorithm is the WCET, worst case execution time which is a bound on the execution time of tasks. Such computing is undecidable in the general case, so it is decidable for certain programs only such as programs without recursion, iteration count, while loops etc.

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