Reactive Streams · interview question
What type of transformation does flatMap() provide in a reactive stream?
Multiple choiceMediumchapter-19-curatedpremiumreactive-streamsnon-blocking-i-o-event-loops
Answer and explanation
Correct answer
D. A one-to-many transformation
Why
The flatMap() method provides a one-to-many transformation, where each item can be transformed into a Publisher of multiple items. This allows for the merging of multiple streams into a single stream.
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