All Guides03-spring-boot-essentials
Spring Boot Essentials
REST API design, validation, configuration, and service wiring using Spring Boot.
backend-engineerspring-bootrestvalidationtesting
Spring Boot Essentials
Build Java backend services with Spring Boot conventions and production-ready patterns.
Key concepts
- IoC and dependency injection for composable service design.
- REST controllers, request binding, response handling, and content negotiation.
- Validation with Bean Validation and global exception handling.
- Externalized configuration with profiles and environment-specific settings.
- Unit testing and integration testing with JUnit and Mockito.
Engineering focus
Structure applications for clarity, testability, and reliable configuration across environments.
Interview Questions
- What is dependency injection and why is it important in Spring Boot?
- How does Spring MVC map HTTP requests to controller methods?
- What is the difference between @Valid and @Validated?
- Why should configuration be externalized from code?
- What is the benefit of integration testing a Spring Boot application?