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Java: What deeper point about Parallel Streams should a senior Java developer mention?

Difficulty:

Hard

Questions:

1

Time Limit:

2 minutes

Passing Score:

100%

Question

What deeper point about Parallel Streams should a senior Java developer mention?

  1. At senior level, the right answer is that Parallel Streams exists mostly for historical syntax reasons.
  2. At senior level, the JVM removes the tradeoffs around Parallel Streams, so design choices barely matter.
  3. Parallel performance depends on split cost, merge cost, data size, and fork-join scheduling overhead rather than on the parallel() call alone.
  4. At senior level, any approach to Parallel Streams is equally correct if it compiles and passes a small test.

Hint

Look beyond syntax and explain the runtime, API, or design consequence.

Answer and rationale

Correct answer: C. Parallel performance depends on split cost, merge cost, data size, and fork-join scheduling overhead rather than on the parallel() call alone.

Parallel performance depends on split cost, merge cost, data size, and fork-join scheduling overhead rather than on the parallel() call alone. This is the kind of tradeoff-aware answer senior interviews usually expect.

Track: Java