[Solved] Which of the following is the correct way to declare a Spring component class? — Ans: @Component public class MyService {} | Spring Boot

Spring Boot - Inversion of Control and Dependency Injection

Which of the following is the correct way to declare a Spring component class?

A@Component public class MyService {}

B@Service public void MyService() {}

Cpublic class MyService {}

D@Component void MyService() {}

Step-by-Step Solution

Solution:

Step 1: Check annotation placement and class declaration
The @Component annotation must be placed above a class declaration, like @Component public class MyService {}.
Step 2: Identify incorrect syntax
A plain public class misses the annotation, annotating a method with @Service or @Component is invalid since components must be classes.
Final Answer:
@Component public class MyService {} -> Option A
Quick Check:
Annotation + class declaration = correct syntax [OK]

Quick Trick: Always put @Component above a class, not a method [OK]

Common Mistakes:

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Which of the following is the correct way to declare a Spring component class?