Which of the following is the correct way to inject a dependency using constructor injection in Spring Boot?

easy📝 Syntax Q12 of 15

Spring Boot - Inversion of Control and Dependency Injection

A@Autowired private Service service;

BService service = new Service();

Cpublic MyClass(Service service) { this.service = service; }

D@Autowired public void setService(Service service) { this.service = service; }

Step-by-Step Solution

Solution:

Step 1: Identify constructor injection syntax
Constructor injection requires a constructor that accepts the dependency as a parameter and assigns it to a field.
Step 2: Match the correct code
public MyClass(Service service) { this.service = service; } shows a constructor receiving Service and assigning it, which is the correct pattern.
Final Answer:
public MyClass(Service service) { this.service = service; } -> Option C
Quick Check:
Constructor injection = constructor with parameters [OK]

Quick Trick: Constructor injection uses constructor parameters, not field annotations [OK]

Common Mistakes:

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