You are developing a Spring Boot application with a large team. How would you manage and segregate configuration properties for different modules?
- By embedding configuration properties directly in the source code to ensure they are tightly coupled with their respective modules.
- By relying on a centralized configuration service that manages properties for all modules in a monolithic manner.
- By storing all configuration properties in a single file and maintaining a shared spreadsheet for tracking properties used by different modules.
- By using Spring Boot's external configuration mechanisms like application.properties or application.yml files, and organizing them into separate folders or packages for each module.
When developing a Spring Boot application with a large team, it's best to use Spring Boot's external configuration mechanisms like application.properties or application.yml files. These can be organized into separate folders or packages for each module, making it easier to manage and segregate configuration properties. Storing all properties in a single file or embedding them in the source code is not a scalable or maintainable approach. A centralized configuration service can be complex and less flexible for individual modules.
What does the @ConditionalOnClass annotation do in the context of Auto Configuration?
- It defines a required class for Auto Configuration.
- It disables Auto Configuration for a specific class.
- It indicates a conditional bean creation.
- It specifies the class to be ignored.
The @ConditionalOnClass annotation, when used in the context of Auto Configuration, defines a required class for Auto Configuration to be enabled. If the specified class is present on the classpath, the associated configuration will be applied. This allows developers to conditionally configure components based on the availability of certain classes. It does not ignore, disable, or indicate conditional bean creation.
In Spring Data JPA, the _____ is responsible for managing transaction boundaries during the execution of a method annotated with @Transactional.
- EntityManager
- JpaTransactionManager
- TransactionBoundaryManager
- Transactional
In Spring Data JPA, the JpaTransactionManager is responsible for managing transaction boundaries during the execution of a method annotated with @Transactional. This manager integrates with the Java Persistence API (JPA) to handle database transactions and ensures that the annotated method's operations are executed within the scope of a single transaction, providing consistency and reliability.
What is the main purpose of JSR-303 Bean Validation in Spring Boot applications?
- To configure database connections.
- To generate code documentation.
- To provide authentication and authorization.
- To validate data input and ensure it meets specified criteria.
The main purpose of JSR-303 Bean Validation in Spring Boot is to validate data input and ensure it meets specified criteria. It helps maintain data integrity by checking that the data conforms to the desired constraints and annotations. While Spring Boot is versatile and can handle other tasks, validation is a key function of JSR-303.
In Spring Boot, the _____ annotation is used to denote a reactive programming model in a controller.
- @Controller
- @ReactiveController
- @ResponseBody
- @RestController
In Spring Boot, the @ReactiveController annotation is used to denote a reactive programming model in a controller. This annotation is specifically designed for reactive programming, and it's part of the Spring WebFlux framework, which enables reactive and non-blocking programming. It's used to define controllers that handle asynchronous and reactive operations.
When configuring OAuth2 Resource Server in Spring Boot, the _____ property is used to specify the location of the public key for verifying JWT signatures.
- public_key_location
- jwt_signing_key
- token_verifier
- security_policy
When configuring an OAuth2 Resource Server in Spring Boot, the public_key_location property is used to specify the location of the public key for verifying JWT signatures. This key is essential for validating the authenticity and integrity of JWT tokens used for authentication and authorization. The other options are not typically used for specifying the public key location.
In Spring Boot, which annotation is used to denote that a test class should load only specific parts of the application context for Web tests?
- @ContextConfiguration
- @SpringBootTest
- @WebAppConfiguration
- @WebMvcTest
The @WebMvcTest annotation is used to load only the Web layer of the Spring application context, making it suitable for testing controllers and related components.
How can you conditionally exclude specific Auto Configurations in a Spring Boot application?
- Using the spring.autoconfigure.exclude property in application.properties or application.yml.
- By annotating the class with @ExcludeAutoConfiguration and specifying the classes to exclude.
- By removing the Auto Configuration JARs from the classpath.
- By using a custom excludeAutoConfiguration method in the main application class.
To conditionally exclude specific Auto Configurations, you can use the spring.autoconfigure.exclude property in your application.properties or application.yml file. This property allows you to specify the fully qualified names of the Auto Configuration classes you want to exclude. The other options do not provide a direct way to conditionally exclude Auto Configurations.
To perform integration testing in Spring Boot, the _____ annotation is used to enable full application context loading.
- @ContextConfiguration
- @IntegrationTest
- @RunWith(SpringRunner.class)
- @SpringBootTest
In Spring Boot, to perform integration testing and enable full application context loading, you use the @SpringBootTest annotation. This annotation loads the entire Spring application context, making it suitable for integration testing scenarios.
To customize the response body of a global exception handler method in Spring Boot, the method should return an object of type _____.
- CustomResponse
- ExceptionResponse
- ResponseEntity
- ResponseObject
To customize the response body of a global exception handler method in Spring Boot, the method should return an object of type ResponseEntity. This allows you to create a custom response with specific status codes, headers, and response bodies when an exception is caught globally. It provides flexibility in crafting error responses tailored to your application's needs.