Why does Spring Boot recommend avoiding field injection in favor of constructor injection from a design perspective?

hard📝 Conceptual Q10 of 15

Spring Boot - Inversion of Control and Dependency Injection

AField injection automatically validates dependencies at compile time

BField injection reduces boilerplate code and improves readability

CConstructor injection allows dependencies to be changed at runtime

DConstructor injection enforces immutability and clear dependency contracts

Step-by-Step Solution

Solution:

Step 1: Understand design benefits of constructor injection
Constructor injection requires dependencies to be provided at creation, making them final and immutable.
Step 2: Contrast with field injection
Field injection hides dependencies and allows mutable state, reducing design clarity and safety.
Final Answer:
Constructor injection enforces immutability and clear dependency contracts -> Option D
Quick Check:
Design reason to avoid field injection = D [OK]

Quick Trick: Constructor injection enforces clear, immutable dependencies [OK]

Common Mistakes:

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