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.
What is the significance of the “spring.factories” file in creating custom Auto Configuration?
- It configures database connection properties for Spring Boot applications.
- It lists all the dependencies required for a Spring Boot application.
- It provides metadata to Spring Boot about custom Auto Configuration classes.
- It specifies the primary bean to be used when there are multiple candidates.
The "spring.factories" file is significant in creating custom Auto Configuration in Spring Boot as it provides metadata to Spring Boot about custom Auto Configuration classes. This file lists the fully qualified names of the Auto Configuration classes that should be loaded and applied when your application starts. It's a crucial part of the automatic configuration process.
What is the primary purpose of configuring a Data Source in a Spring Boot application?
- To define the application's main class.
- To configure the application's logging.
- To manage the application's dependencies.
- To establish a connection to a database.
Configuring a Data Source in a Spring Boot application is primarily done to establish a connection to a database. This is crucial for applications that need to interact with a database to store or retrieve data. While the other options are essential in a Spring Boot application, they are not the primary purpose of configuring a Data Source.
Which annotation is used to disable full auto-configuration and instead apply only configuration relevant to JPA tests in Spring Boot?
- @AutoConfigureTestDatabase
- @JpaTest
- @RunWith(SpringRunner.class)
- @SpringBootTest
The @JpaTest annotation is used in Spring Boot to disable full auto-configuration and apply configuration relevant to JPA tests. It sets up an environment for testing JPA repositories. @SpringBootTest and @RunWith(SpringRunner.class) are more general-purpose testing annotations, while @AutoConfigureTestDatabase is used for configuring the test database.