Spring Boot interview questions

Model how /actuator/health combines multiple health indicators into one overall status. Implement entryPoint(Map<String, String> componentStatuses). Each entry maps a component name to its own status: "UP", "DOWN",

What does adding spring-boot-starter-actuator give you out of the box, and why are most of its endpoints — besides /health and /info — not exposed over HTTP by default?

Model a simplified @ConditionalOnClass. Implement entryPoint(Set<String> classpath, List<List<String>> candidates). Each entry in candidates is a two-element list [beanName, requiredClassName], representing an auto-configuration that would

In plain terms, what does @SpringBootApplication turn on, and what is a "starter" (like spring-boot-starter-web) actually made of?

Model Spring's default cache key generation (SimpleKeyGenerator). Implement entryPoint(List<String> params), where params are a method's arguments, already converted to strings, in parameter order. If there are no parameters, return "SimpleKey[]". If there

In one sentence each: what do @Cacheable, @CachePut, and @CacheEvict each actually do to the cache?