Project Reactor · interview question
Which method in Project Reactor would you use to subscribe to a Mono and provide a fallback value if it completes empty?
Multiple choiceHardchapter-19-curatedpremiumproject-reactorproject-reactor-mono
Answer and explanation
Correct answer
A. Mono.defaultIfEmpty()
Why
Mono.defaultIfEmpty() allows you to specify a fallback value in case the Mono completes without emitting any item, providing a seamless way to handle such cases.
Test yourself on Project Reactor
A free test with instant, explained results. No account needed.
More Project Reactor questions
- In the context of Reactive Streams, what role does a Subscriber play?
- If a Mono completes empty, which of the following methods can be used to provide a default value?
- When transitioning from Spring MVC to WebFlux, what is a key advantage concerning server performance?
- When using Mono<User> in a reactive system, how should you handle a database call to ensure it remains non-blocking?
- What does the Publisher interface in the Reactive Streams specification do?
- Which of the following statements about the Event Loop in a non-blocking reactive system is true?