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Which one of these lists contains only static methods of Thread?

  • A.sleep, yield, currentThread
  • B.sleep, join, interrupt
  • C.start, run, yield
  • D.currentThread, setPriority, isAlive

Answer: A

Correct answer: sleep, yield, currentThread

All three concern the thread that is running rather than any named one, which is what makes them static. The other lists mix in join, interrupt, start, setPriority and isAlive, each of which is addressed to a particular thread object and so cannot be static.

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