Spring / Spring7 basics Interview questions
What are Spring profiles?
Profiles let you group beans and configuration so that only a chosen subset is active for a given environment - typically dev, test, and prod. A bean marked with @Profile("dev") is only registered when the dev profile is active; it's completely invisible to the container otherwise.
@Bean @Profile("dev") public DataSource devDataSource() { return new EmbeddedDatabaseBuilder().setType(EmbeddedDatabaseType.H2).build(); }
Active profiles are set via the spring.profiles.active property, an environment variable, or a command-line argument, and multiple profiles can be active at once. This is commonly combined with profile-specific property files, such as application-dev.properties, so each environment gets its own configuration without touching code.
Which property typically activates a Spring profile?
What happens to a bean marked @Profile("dev") when the dev profile isn't active?
More Related questions...
