Java SE 8 Programmer II — Question 125

Which two statements are true about the Fork/Join Framework? (Choose two.)

Answer options

• A. The RecursiveTask subclass is used when a task does not need to return a result.
• B. The Fork/Join framework can help you take advantage of multicore hardware.
• C. The Fork/Join framework implements a work-stealing algorithm.
• D. The Fork/Join solution when run on multicore hardware always performs faster than standard sequential solution.

Correct answer: A, C

Explanation

Option A is correct because the RecursiveTask is specifically designed for tasks that return results, while RecursiveAction is used for those that do not. Option C is correct as the Fork/Join framework indeed uses a work-stealing algorithm to efficiently balance workloads across threads. Options B and D are misleading; while the framework can utilize multicore hardware, it does not guarantee performance will always be better than sequential solutions.