Use starters, auto-configuration, configuration properties, profiles, logging, and Actuator in a maintainable service.
Spring Boot · application
Use the strong answer as your reference, explain it aloud in your own words, then choose how soon you want to review it again.
Interview prompt
Strong answer
Spring Boot provides conventions, starters, auto-configuration, and production tooling around Spring. Auto-configuration is conditional and can be inspected; it should accelerate a known application model rather than become magic that nobody can debug.
Key points
Interviewer looks for
Explain what Boot adds to Spring and how you would diagnose unexpected auto-configuration.
Java example
1@SpringBootApplication
2public class Application {
3 public static void main(String[] args) {
4 SpringApplication.run(Application.class, args);
5 }
6}Topic interview questions
These questions are tied to this lesson. Read each question aloud, then compare your explanation with the strong answer.
Strong answer
Boot supplies conventions, starters, conditional auto-configuration, an embedded runtime, externalized configuration, and operational tooling. It reduces setup while keeping the underlying Spring model inspectable.
Strong answer
Auto-configuration creates conditional bean definitions based on the classpath, existing beans, properties, and application context. It can be inspected and overridden when the defaults do not match the application.
Strong answer
Starters are curated dependency descriptors for common capabilities such as web, data, or security. They simplify dependency selection and help keep compatible transitive versions together.
Strong answer
Keep environment-specific values outside code, bind them into typed configuration objects, validate required values, and avoid committing secrets. Make the active configuration observable without exposing credentials.
Strong answer
Inspect the condition evaluation report, startup logs, active profiles, dependency graph, and registered beans. Then exclude or override the specific configuration only after identifying why it matched.
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