In Spring Security, the method loadUserByUsername is defined in the _____ interface.

  • UserDetailsService
  • AuthenticationProvider
  • UserDetails
  • Authentication
In Spring Security, the method loadUserByUsername is defined in the UserDetailsService interface. This method is responsible for loading user details (including credentials) based on the username provided during authentication. The other options, such as AuthenticationProvider, UserDetails, and Authentication, are not interfaces that define this specific method.

In Spring Cloud, _____ allows services to find each other and aids in building scalable and robust cloud-native applications.

  • Eureka
  • Hystrix
  • Ribbon
  • Zuul
Eureka is the service discovery component in Spring Cloud. It helps services discover and connect to each other, facilitating the development of scalable and robust cloud-native applications.

In cases where a required dependency is not found, the @Autowired annotation will throw a _____.

  • NoSuchBeanDefinitionException
  • BeanCreationException
  • DependencyNotFoundException
  • AutowireException
In cases where a required dependency is not found, the @Autowired annotation will throw a BeanCreationException. This exception occurs when Spring cannot find a suitable bean to inject for a required dependency. The other options, such as NoSuchBeanDefinitionException, DependencyNotFoundException, and AutowireException, are not the standard exceptions thrown by @Autowired in this scenario.

How can you customize the response status code of a controller method in Spring Boot?

  • By returning an instance of ResponseEntity with a custom status code.
  • By using the @ResponseStatus annotation with the desired code.
  • Modifying the application.properties file with a custom code.
  • Configuring the status code in the @GetMapping annotation.
To customize the response status code of a controller method in Spring Boot, you can return an instance of ResponseEntity with a custom status code. This allows fine-grained control over the response, including status codes, headers, and response bodies. The @ResponseStatus annotation is used to declare the default status code for the entire controller class, not for individual methods. The other options are not standard ways to customize the status code.

In Spring Boot, to create a RESTful web service, you would typically use the _____ annotation on a controller class.

  • @Controller
  • @RequestMapping
  • @RequestMapping and @RestController
  • @RestController
In Spring Boot, to create a RESTful web service, you typically use the @RestController annotation on a controller class. This annotation combines the functionality of both the @Controller and @ResponseBody annotations, making it convenient for creating RESTful endpoints that return data directly in the response body, without the need for a view.

In Spring Security, a custom access decision voter can be created to use with method security by implementing the _____ interface.

  • AccessDecisionVoter
  • Authentication
  • Authorization
  • UserDetails
In Spring Security, a custom access decision voter can be created by implementing the AccessDecisionVoter interface. This interface allows you to define your own logic for making access control decisions when using method security.

The @SpringBootTest annotation in Spring Boot is used to _____.

  • configure application properties
  • define custom Spring beans
  • load the Spring application context
  • run integration tests
The @SpringBootTest annotation is used to load the Spring application context, including all the beans defined in your application, and configure it for testing. It's typically used in integration tests to ensure that your Spring Boot application context is set up correctly.

How do Flyway and Liquibase primarily differ in managing database migrations in Spring Boot applications?

  • Flyway uses XML-based migration scripts, while Liquibase uses SQL.
  • Flyway is only suitable for small databases, while Liquibase is for large databases.
  • Flyway relies on the Java Persistence API, while Liquibase doesn't.
  • Flyway is a paid tool, while Liquibase is open-source.
Flyway and Liquibase are both popular tools for managing database migrations in Spring Boot applications, but they differ primarily in how they handle migration scripts. Flyway uses SQL-based migration scripts, whereas Liquibase supports various formats, including XML. This distinction can affect the choice of tool based on your team's preferences and existing database scripts. The other options are not accurate differentiators between Flyway and Liquibase.

For creating a custom constraint annotation in Spring Boot, the annotation should be annotated with _____.

  • @Constraint
  • @ConstraintAnnotation
  • @CustomConstraintAnnotation
  • @CustomValidation
In Spring Boot, to create a custom constraint annotation, the annotation itself should be annotated with @Constraint. This indicates to Spring Boot that the annotation is intended to be used as a validation constraint. You can then define your custom validation logic within the annotation class. This allows you to create custom validation rules in Spring Boot.

The use of _____ in Spring Security allows for the application of security constraints on methods across various layers of an application.

  • @ApplyConstraints
  • @EnableMethodSecurity
  • @EnableSecurity
  • @MethodConstraints
The use of @EnableMethodSecurity in Spring Security allows for the application of security constraints on methods across various layers of an application. It is used at the configuration level to enable method-level security annotations.