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What is the main purpose of the @PostConstruct annotation in a Spring Boot application?

easy📝 Conceptual Q11 of 15
Spring Boot - Spring Annotations
What is the main purpose of the @PostConstruct annotation in a Spring Boot application?
ATo run a method immediately after the bean is created and dependencies are injected
BTo mark a method that should run before the bean is destroyed
CTo define a method that runs only when the application starts
DTo schedule a method to run repeatedly at fixed intervals
Step-by-Step Solution
Solution:

  1. Step 1: Understand the role of @PostConstruct

    @PostConstruct is used to run initialization code after the Spring bean is fully created and dependencies are set.

  2. Step 2: Compare with other lifecycle annotations

    @PreDestroy runs before bean removal, and scheduling annotations run repeatedly, so they don't match @PostConstruct's purpose.

  3. Final Answer:

    To run a method immediately after the bean is created and dependencies are injected -> Option A

  4. Quick Check:

    @PostConstruct = run after bean creation [OK]
Quick Trick: Remember: PostConstruct runs right after bean setup [OK]
Common Mistakes:
  • Confusing @PostConstruct with @PreDestroy
  • Thinking @PostConstruct runs before bean creation
  • Assuming it schedules repeated tasks

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