[Solved] What will happen if a class annotated with @Service is not detected by Spring's component scanning? — Ans: The class will not be registered as a Spring bean and won't be injected | Spring Boot

Spring Boot - Spring Annotations

What will happen if a class annotated with @Service is not detected by Spring's component scanning?

AThe application will fail to start

BThe class will not be registered as a Spring bean and won't be injected

CThe class will be registered automatically anyway

DSpring will throw a compilation error

Step-by-Step Solution

Solution:

Step 1: Understand component scanning
Spring detects beans by scanning packages for stereotype annotations like @Service.
Step 2: Consequence of missing scanning
If the class is not scanned, it won't be registered as a bean and cannot be injected.
Final Answer:
The class will not be registered as a Spring bean and won't be injected -> Option B
Quick Check:
Missing scan = no bean registration [OK]

Quick Trick: Ensure package scanning includes all @Service classes [OK]

Common Mistakes:

Master "Spring Annotations" in Spring Boot

9 interactive learning modes - each teaches the same concept differently

More Spring Boot Quizzes

What will happen if a class annotated with @Service is not detected by Spring's component scanning?