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Exam 1z0-829 topic 1 question 30 discussion

Actual exam question from Oracle's 1z0-829
Question #: 30
Topic #: 1
[All 1z0-829 Questions]

Given the code fragment:

Which code fragment invokes all callable objects in the workers set?

  • A.
  • B. executorService.submit(cThreads);
  • C.
  • D.
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Suggested Answer: D 🗳️
by supersquax at Jan. 31, 2024, 9:47 a.m.

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SrinivasJasti
3 months, 3 weeks ago
Selected Answer: D
invokeAll(): This method takes a collection of Callable tasks and executes them concurrently. It blocks until all tasks are complete. It returns a list of Future objects, which you can use to obtain the result of each task.
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james2033
8 months ago
Selected Answer: D
// D. List<Future<String>> futures = executorService.invokeAll(workers); for (Future<String> future : futures) { System.out.println(future.get()); }
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supersquax
8 months, 3 weeks ago
D is correct. A and B reference "cThreads" which isn't declared anywhere. C uses invokeAny(), which doesnt return a List. It returns the result of the first successfully completed task.
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