Interview Questions
Spring Boot is a framework for building stand-alone, production-grade Spring applications
with features like auto-configuration, embedded servers, and starter templates.
Spring Boot uses spring-boot-starter modules to manage dependencies, simplifying setup by
including compatible libraries and their versions.
@SpringBootApplication is a composite annotation that configures the application, enabling
auto-configuration and component scanning.
Embedded servers like Tomcat or Jetty allow Spring Boot applications to run stand-alone
without requiring an external server.
Use @RestController to define REST endpoints and @RequestMapping or @GetMapping,
@PostMapping, etc., to map HTTP requests to methods.
Define multiple DataSource beans and use @Primary to specify the default one, or configure
them with @Configuration classes for different purposes.
Both interfaces are used to execute code after the Spring Boot application starts.
CommandLineRunner accepts command-line arguments, while ApplicationRunner provides access to
ApplicationArguments.
Use Spring Boot Actuator's /actuator/metrics and /actuator/heapdump endpoints or integrate
with monitoring tools like Prometheus and Grafana for profiling.
Integrate Spring Security by adding the spring-boot-starter-security dependency and
configure security settings in a @Configuration class using @EnableWebSecurity
Create a new project with a spring-boot-starter dependency, define the starter’s
auto-configuration class, and include required dependencies. Package it as a JAR and publish
it for reuse.
