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A task's response time equals its deadline exactly. The task is

  • A.indeterminate without knowing its period
  • B.just schedulable, with no margin whatever
  • C.unschedulable, the deadline having been reached
  • D.schedulable with a comfortable margin

Answer: B

Meeting the deadline at the instant it falls due satisfies the requirement, so the task is schedulable, but a single cycle of extra execution anywhere above it in priority would break it. No sensible design ships in that condition.

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