Spring Boot - Inversion of Control and Dependency Injection
You want to create a Bean that should be instantiated only once and shared across the application. Which scope should you use?
You want to create a Bean that should be instantiated only once and shared across the application. Which scope should you use?
hard📝 Conceptual Q8 of 15
Step-by-Step Solution
Solution:
Step 1: Understand Bean scopes in Spring
Singleton scope means one instance per Spring container, shared everywhere.Step 2: Compare with other scopes
Prototype creates new instance each time, request and session are web scopes.Final Answer:
singleton -> Option CQuick Check:
Single shared Bean = singleton scope [OK]
Quick Trick: Singleton scope creates one shared Bean instance [OK]
Common Mistakes:
- Confusing prototype with singleton
- Using request/session scopes outside web context
- Assuming default is prototype
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