Core Spring Boot Test 3

Which annotation allows binding properties from application.properties or application.yml to a Java POJO?

Which of the following is NOT a key feature of Spring Boot?

Which statement correctly distinguishes between @Controller and @RestController?

Which annotation is used to extract query parameters in a Spring Boot controller?

What will happen when this Spring Boot code runs?

@Component
public class ServiceA {}

@Component
public class ServiceB {
    private final ServiceA serviceA;

    @Autowired
    public ServiceB(ServiceA serviceA) {
        this.serviceA = serviceA;
    }
}

What will happen when this code runs with the "dev" profile active?

@Component
@Profile("dev")
public class DevDatabaseConfig implements DatabaseConfig {}

What will the following code do in a Spring Boot application?

@Component
public class CustomHealthIndicator implements HealthIndicator {
    @Override
    public Health health() {
        return Health.up().withDetail("customCheck", "All good!").build();
    }
}

What does the following code achieve?

@ControllerAdvice
public class GlobalHandler {
    @ExceptionHandler({IOException.class, SQLException.class})
    public ResponseEntity<String> handleIOAndSQL(Exception ex) {
        return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR)
                             .body("Error: " + ex.getMessage());
    }
}

How can you set the logging level for a specific package in Spring Boot using application.properties?

What port will the embedded Tomcat server run on with the following configuration?

server:
  port: 9090

What is the purpose of the @Value annotation in Spring Boot configuration?

When you add the spring-boot-starter-web dependency to your project, what does Spring Boot auto-configure for you by default?

What is the purpose of the following code?

@ConfigurationProperties(prefix = "app")
@Component
public class AppProperties {
    private String name;
    private int version;
    // getters and setters
}

What will `/api/user?id=10` return in the following code?

@RestController
@RequestMapping("/api")
public class UserController {
    @GetMapping("/user")
    public String getUser(@RequestParam int id) {
        return "User ID: " + id;
    }
}

In the following code, how is ServiceA injected into ServiceB?

@Component
public class ServiceA {}

@Component
public class ServiceB {
    private ServiceA serviceA;

    @Autowired
    public void setServiceA(ServiceA serviceA) {
        this.serviceA = serviceA;
    }
}

How can you make a bean active for multiple profiles?

What does the following code achieve?

@Component
public class CustomMetrics {
    @Autowired
    private MeterRegistry registry;

    public void incrementRequests() {
        registry.counter("custom.requests").increment();
    }
}

Why is ResponseEntity commonly used in exception handlers?

What will happen when this component is executed?

@Component
public class MyService {
    private static final Logger logger = LoggerFactory.getLogger(MyService.class);

    public void process() {
        logger.info("Processing started");
    }
}

Which server will Spring Boot use when this dependency is included?

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-undertow</artifactId>
</dependency>