For advanced scenarios in service discovery, such as region isolation, the Spring Cloud component ____ can be configured along with Eureka.
- Feign
- Hystrix
- Ribbon
- Zuul
For advanced scenarios in service discovery, such as region isolation, the Spring Cloud component Ribbon can be configured along with Eureka. Ribbon is a client-side load balancer that works seamlessly with Eureka for client-side load balancing. It allows you to customize load-balancing strategies and apply them to different scenarios, such as region-based routing or weighted load balancing, by configuring properties and policies.
The @DataJpaTest annotation in Spring Boot is typically used to test _____.
- REST APIs
- database interactions
- user interfaces
- web controllers
@DataJpaTest is used to test database interactions. It loads a minimal Spring application context that focuses on JPA (Java Persistence API) components such as repositories. This is helpful for testing data access and database-related functionality.
How can you implement a fallback mechanism for exceptions not caught by any @ExceptionHandler methods?
- By adding a catch-all exception handler method in the main application class.
- By configuring a central ExceptionHandlerExceptionResolver bean.
- By defining a default exception handler method in a base controller class.
- By using the default Spring Boot exception handling mechanism.
You can implement a fallback mechanism for exceptions not caught by any @ExceptionHandler methods by defining a default exception handler method in a base controller class. This method acts as a catch-all for unhandled exceptions in that specific controller. It's important to note that this approach is controller-specific and may not handle exceptions from other controllers. It provides a way to handle uncaught exceptions within the scope of the controller.
You need to inject a collection of beans in a certain order in your Spring Boot application. How would you ensure the correct order of beans in the injected collection?
- The order of bean injection in a collection is determined by the order they are declared in the configuration class.
- Use the @Order annotation on each bean and specify an order value for each bean.
- Use the @Priority annotation on the beans and assign priority values.
- Use the @Qualifier annotation to specify the order when injecting the collection.
To ensure the correct order of beans in an injected collection, you can use the @Order annotation on each bean and specify an order value. Spring will then inject the beans in ascending order of their order values. This is a common practice to establish the desired order for beans that need to be injected in a specific sequence.
In Spring Boot, the _____ annotation can be used to specify the conditions that must be met for a component to be registered.
- @ComponentCondition
- @ComponentScan
- @Conditional
- @ConditionalOnProperty
In Spring Boot, the "@Conditional" annotation is used to specify conditions that must be met for a component to be registered. This annotation is often used in combination with other conditional annotations like "@ConditionalOnProperty" to conditionally enable or disable components based on specific criteria.
How can a custom auto-configuration be created in Spring Boot?
- By defining a class annotated with @SpringBootApplication.
- By using the @EnableAutoConfiguration annotation.
- By creating a class with @Configuration and @ConditionalOnClass annotations.
- By specifying properties in the application.properties file.
In Spring Boot, you can create custom auto-configurations by defining a class with the @Configuration annotation and using the @ConditionalOnClass annotation to conditionally enable the configuration based on the presence of specific classes. This allows you to control when your custom auto-configuration should be applied. The other options do not directly relate to creating custom auto-configurations in Spring Boot.
To handle exceptions that occur during form binding, you can use the _____ method of the DataBinder class in Spring Boot.
- setExceptionHandler
- setBindingExceptionHandler
- setFormExceptionHandler
- setValidationExceptionHandler
To handle exceptions during form binding in Spring Boot, you can use the setBindingExceptionHandler method of the DataBinder class. This method allows you to set an exception handler specifically for form binding. The other options do not correspond to valid methods for handling exceptions during form binding in Spring Boot.
In Spring Boot, to exclude specific auto-configuration classes from being applied, the _____ property can be used in the application properties file.
- spring.autoconfig.exclude
- spring.autoconfigure.exclude
- spring.config.exclude
- spring.exclude.autoconfig
In Spring Boot, you can exclude specific auto-configuration classes from being applied by using the "spring.autoconfigure.exclude" property in the application properties file. This is helpful when you want to customize your application's configuration and prevent certain auto-configurations from being applied.
What is the significance of the @Transactional annotation in Spring Data JPA?
- It specifies the transaction isolation level for JPA transactions.
- It marks a method as transactional, ensuring that it runs within a database transaction.
- It defines the data source for JPA entities.
- It configures the caching behavior of JPA repositories.
The @Transactional annotation in Spring Data JPA marks a method as transactional, ensuring that it runs within a database transaction. This annotation is crucial for maintaining data consistency and integrity in JPA-based applications. It helps manage transactions, including starting, committing, or rolling back when exceptions occur. The other options do not accurately represent the role of the @Transactional annotation in Spring Data JPA.
In Spring Boot, the _____ annotation is used to indicate a component whose role is to represent a data repository.
- @Component
- @Controller
- @Entity
- @Repository
In Spring Boot, the @Repository annotation is used to indicate a component whose role is to represent a data repository. It is typically applied to classes that interact with a database, providing data access operations. @Component is a more general-purpose annotation, and @Entity is used to represent persistent entities in JPA. @Controller is used for defining controllers in Spring MVC.