Spring / Spring7 basics Interview questions
What is the purpose of the @Component annotation?
@Component marks a plain Java class as a candidate for auto-detection during component scanning, so Spring registers it as a bean without any explicit @Bean method or XML entry. It's the most generic stereotype annotation in the framework.
@Component public class SlugGenerator { public String slugify(String input) { return input.toLowerCase().replace(" ", "-"); } }
When @ComponentScan (added automatically by @SpringBootApplication) scans the package tree, it finds every class annotated with @Component or one of its specializations - @Service, @Repository, @Controller - and registers each as a singleton bean by default, ready to be injected wherever it's needed.
What does @Component allow Spring to do?
Which mechanism finds classes annotated with @Component?
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