Mutual Exclusion Constraints and Scheduling Problems Quiz

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Questions and Answers

Which type of problem is the multiprocessor scheduling problem with two processors, no resources, independent tasks, and arbitrary task computation times?

  • Impossible
  • NP-complete (correct)
  • Polynomial
  • NP-hard

What is the difficulty of deciding whether it is possible to schedule a set of periodic tasks that use only semaphores to enforce mutual exclusion?

  • NP-hard (correct)
  • NP-complete
  • Polynomial
  • Impossible

What is the difficulty of finding a totally online optimal run-time scheduler when there are mutual exclusion constraints?

  • Impossible (correct)
  • NP-complete
  • Polynomial
  • NP-hard

What type of relation is indicated by a partial-order relation in the context of multiprocessor scheduling?

<p>Transitive relation (B)</p>
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What is the difficulty of the multiprocessor scheduling problem with two processors, no resources, arbitrary partial-order relations, and every task having a 1-unit computation time?

<p>Polynomial (A)</p>
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According to Amdahl's Law, what does it measure?

<p>The effectiveness of parallelization in a parallel computer system (B)</p>
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Which type of computer system is Amdahl's Law still relevant in today?

<p>Real-time systems (B)</p>
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What is the current usage of multi-core processors in real-time systems similar to?

<p>Multiple independent uniprocessors (A)</p>
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What is the term used to describe multi-core processors with an increasing number of parallel on-chip cores?

<p>Chip multiprocessors (B)</p>
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Where are multi-core processors with an increasing number of parallel on-chip cores used in significant quantities?

<p>Cell phone exchanges (D)</p>
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