Java Interview Questions · interview question

Which practice avoids a common mistake with Parallel Streams?

Multiple choiceMediumjava-interview-2026interviewjavapitfall

Prefer the version of Parallel Streams that makes behavior less predictable as long as the code compiles.Do not combine parallel streams with shared mutable state and still expect deterministic, safe behavior.Silence the Parallel Streams problem by using raw types, broad catches, or shared mutable state.Ignore the Parallel Streams issue and rely on team discipline instead of APIs or contracts.

Answer and explanation

Correct answer

B. Do not combine parallel streams with shared mutable state and still expect deterministic, safe behavior.

Why

Do not combine parallel streams with shared mutable state and still expect deterministic, safe behavior. This is a common failure mode in real Java code and a frequent interview follow-up.

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Which practice avoids a common mistake with Parallel Streams?

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