In Spring Cloud, the _____ is used for defining service instance metadata and implementing custom service instance selection policies.
- Eureka
- Hystrix
- Ribbon
- Zuul
In Spring Cloud, Eureka is used for defining service instance metadata and implementing custom service instance selection policies. Eureka is a service registry and discovery server that helps manage microservices in a distributed system.
Which of the following is true regarding the @SpringBootTest annotation when testing Spring Boot applications?
- It is used exclusively for unit testing individual components.
- It loads the entire Spring application context, enabling comprehensive integration testing.
- It only loads a specific set of predefined components.
- It requires a separate test configuration file.
The @SpringBootTest annotation is used for integration testing in Spring Boot. It loads the entire Spring application context, allowing you to test the interaction of various components in your application. It's suitable for end-to-end testing.
You are developing a Spring Boot application which has conflicting auto-configuration classes. How would you analyze and resolve these conflicts to ensure the correct configurations are applied?
- Analyze the order of auto-configuration classes and ensure the conflicting configurations are loaded in the desired order.
- Create a custom auto-configuration class to override conflicting configurations explicitly.
- Remove one of the conflicting auto-configuration classes to eliminate conflicts.
- Change the Spring Boot version to resolve auto-configuration conflicts.
Analyzing the order of auto-configuration classes is a common approach to resolve conflicts. Spring Boot follows a specific order to load auto-configurations, and understanding this order allows you to control which configurations take precedence. The other options might work in some cases but are not the most typical or recommended approaches.
In the context of Global Method Security, how can custom permission evaluators be integrated to extend the functionality of method security expressions?
- By using @CustomEvaluator annotation
- By implementing the PermissionEvaluator interface
- By setting useCustomEvaluators property to true in XML configuration
- By adding a customEvaluators bean in the application context
Custom permission evaluators can be integrated by implementing the PermissionEvaluator interface. You need to provide your custom logic for evaluating permissions, and then configure Spring to use your custom evaluator in security expressions.
To customize the way method parameters are bound to web requests in Spring Boot, you can use the @_____ annotation.
- @RequestParam
- @Request
- @RequestParameter
- @RequestParamBinding
To customize the way method parameters are bound to web requests in Spring Boot, you can use the @RequestParam annotation. This annotation allows you to specify how request parameters are mapped to method parameters in your controller methods. It provides options for customizing the binding process to suit your application's needs.
To apply data migration scripts in Spring Boot, you can use tools like _____ or _____.
- DBMigrate
- Flyway
- Liquibase
- SpringMigrate
In Spring Boot, you can use tools like Flyway or Liquibase to apply data migration scripts. These tools help manage database schema changes and versioning, ensuring that your application's database is kept in sync with the evolving data structure required by your application's code. The choice between these tools often depends on your team's preferences and project requirements.
Which annotation in Spring is used to automate the wiring of bean dependencies?
- @Autowired
- @Bean
- @Configuration
- @Inject
In Spring, the @Autowired annotation is used to automate the wiring of bean dependencies. When applied to fields, constructors, or methods, it allows Spring to automatically inject the appropriate beans or dependencies, making the code more readable and reducing the need for manual wiring.
When testing RESTful APIs in Spring Boot, which utility would you prefer to use for simulating HTTP requests?
- HttpRequest
- HttpSimulator
- MockMvc
- RestClient
In Spring Boot, MockMvc is commonly used for simulating HTTP requests when testing RESTful APIs. It provides a powerful and expressive API for testing Spring MVC controllers.
The @Autowired annotation in Spring can be used to autowire bean on the _____
- Constructor
- Field
- Method
- Setter
The "@Autowired" annotation in Spring can be used to autowire a bean on a "Field." This means that Spring will automatically inject the required dependency by setting the field directly. "@Autowired" can also be used on constructors, setters, and methods, but in this specific question, the focus is on field injection. Constructor injection, setter injection, and method injection are other ways to achieve dependency injection in Spring.
The _____ annotation in Spring Boot is used to handle exceptions of type MethodArgumentNotValidException to catch validation errors.
- @ExceptionHandler
- @ValidationHandler
- @MethodArgExceptionHandler
- @ExceptionHandler
In Spring Boot, the @ExceptionHandler annotation is used to handle exceptions, including those of type MethodArgumentNotValidException, which are thrown when validation errors occur during method argument processing. This annotation allows you to define methods to handle specific exception types, making it a key component for custom exception handling in Spring Boot. The other options are not standard annotations for handling validation errors.