[Solved] Given this bean declaration:@Component @Scope("session") public class ShoppingCart { }What is the likely error if you try to inject this bean into a singleton scoped bean without special handling? | Spring Boot

Spring Boot - Spring Annotations

Given this bean declaration:

@Component
@Scope("session")
public class ShoppingCart { }

What is the likely error if you try to inject this bean into a singleton scoped bean without special handling?

ANo error, injection works normally

BRuntime error due to incompatible scopes

CCompilation error due to missing @Scope annotation

DBean is created once and shared across all sessions

Step-by-Step Solution

Solution:

Step 1: Understand scope mismatch problem
Injecting a session-scoped bean into a singleton bean causes a scope mismatch because singleton lives longer than session beans.
Step 2: Result of mismatch without proxy
Without proxy or special configuration, Spring throws a runtime error as it cannot inject a shorter-lived bean into a longer-lived one safely.
Final Answer:
Runtime error due to incompatible scopes -> Option B
Quick Check:
Session bean into singleton without proxy = runtime error [OK]

Quick Trick: Injecting shorter scope bean into singleton causes runtime error [OK]

Common Mistakes:

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