Dependency Injection · interview question
How does Spring Boot handle dependency injection when multiple beans match the type being injected?
Multiple choiceMediumchapter-9-curatedpremiumdependency-injectionconstructor-vs-field-injection
Answer and explanation
Correct answer
D. Uses the @Primary annotation
Why
When multiple beans match the type being injected, Spring Boot uses the @Primary annotation to determine which bean to inject. If no @Primary is defined and ambiguity persists, an exception is thrown.
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