[Solved] Why does this bean fail to create?@Bean @ConditionalOnBean(name = "missingBean") public MyBean myBean() { return new MyBean(); }Assuming no bean named "missingBean" exists in the context. | Spring Boot

Spring Boot - Advanced Patterns

Why does this bean fail to create?

@Bean
@ConditionalOnBean(name = "missingBean")
public MyBean myBean() { return new MyBean(); }

Assuming no bean named "missingBean" exists in the context.

ABecause @ConditionalOnBean requires a class, not a name

BBecause @Bean annotation is missing

CBecause the required bean named "missingBean" does not exist

DBecause the method return type is incorrect

Step-by-Step Solution

Solution:

Step 1: Understand @ConditionalOnBean with name attribute
The annotation checks if a bean with the given name exists in the context.
Step 2: Analyze context state
No bean named "missingBean" exists, so the condition fails and the bean is not created.
Final Answer:
Because the required bean named "missingBean" does not exist -> Option C
Quick Check:
@ConditionalOnBean(name) requires bean presence by name [OK]

Quick Trick: Bean name must exist for @ConditionalOnBean(name) [OK]

Common Mistakes:

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Why does this bean fail to create?