Skip to content
Sharp

Reactive Streams · interview question

Why does the difference between a Flux and a Mono in Project Reactor matter in practice?

Multiple choiceMediumchapter-19-curatedpremiumreactive-streamsblocking-the-event-loop
Choose one answer
Answer and explanation

Correct answer

A. Flux can emit multiple items, Mono emits one or none.

Why

A Flux can emit multiple items, zero to many, while a Mono is limited to emitting a single item or completing with an error, making them suitable for different use cases.

Test yourself on Reactive Streams

A free test with instant, explained results. No account needed.

Start free test
All Reactive Streams questions →