Pass the VMware VCP-AM Develop 2022 2V0-72.22 Questions and answers with ValidTests

This is true because the default scope of a bean in Spring is singleton, which means that only one instance of the bean will be created and shared by the entire application context. The @Bean annotation on the accountRepository() method indicates that this method will return a bean that will be managed by Spring. However, this method will not be called every time the bean is needed, but only once when the bean is first created. Therefore, only one AccountRepository bean will be instantiated and injected into the TransferService and AccountService beans.

A. @Configuration This annotation indicates that the class has @Bean definition methods and may be processed by the Spring container to generate bean definitions and service requests for those beans at runtime. B. @ComponentScan This annotation configures component scanning directives for use with @Configuration classes. Provides support parallel with Spring XML's context:component-scan element.

(1) BeanFactoryPostProcessor (Spring Framework 6.1.3 API). https://docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/beans/factory/config/BeanFactoryPostProcessor.html. (2) Spring BeanPostProcessor | Baeldung. https://www.baeldung.com/spring-beanpostprocessor. (3) BeanFactoryPostProcessor - Spring | Home. https://docs.spring.io/spring-framework/docs/3.0.x/javadoc-api/org/springframework/beans/factory/config/BeanFactoryPostProcessor.html. (4) BeanFactoryPostProcessor (Spring Framework API 2.5). https://docs.spring.io/spring-framework/docs/2.5.x/javadoc-api/org/springframework/beans/factory/config/BeanFactoryPostProcessor.html. (5) Spring BeanPostProcessor Example - HowToDoInJava. https://howtodoinjava.com/spring-core/spring-bean-post-processors/

B. If an embedded database is on the classpath, it will be used to configure a DataSource by default.

This is true because the @DataJpaTest annotation enables auto-configuration of an embedded database if one is available on the classpath, such as H2, HSQLDB, or Derby. This allows the test to run with a temporary and isolated database that can be configured with test data.

D. It auto-configures a TestEntityManager bean.

This is true because the @DataJpaTest annotation provides a TestEntityManager bean that can be used to perform common JPA operations in the test. The TestEntityManager is an alternative to the standard EntityManager that provides some convenience methods and exception translation.

The @Autowired annotation can be used to inject a dependency into a field, a constructor, or a setter method. However, if there are multiple beans of the same type in the application context, Spring will not be able to determine which one to inject by default. To resolve this ambiguity, we can use the @Qualifier annotation to specify the bean id of the desired dependency. Alternatively, we can use the bean id as the name of the field or the parameter of the setter method, and Spring will match it with the corresponding bean.

Spring supports different scopes for bean instances, such as singleton, prototype, request, session, etc. The scope determines how many instances of a bean are created and how they are shared among other components. The default scope is singleton, which means that only one instance of a bean is created per application context and it is shared by all components that depend on it.

C. Dependencies between application components can be managed external to the components.

This is true because dependency injection allows the application components to declare their dependencies without creating or obtaining them directly. Instead, the dependencies are provided by an external entity, such as the Spring container, which can read the configuration from XML files, annotations, or Java code1.

D. Configuration can be externalized and centralized in a small set of files.

This is true because dependency injection enables the separation of concerns between the application logic and the configuration. The configuration can be stored in a small number of files that can be easily changed without affecting the source code2.

F. Dependency injection facilitates loose coupling between components.

This is true because dependency injection reduces the direct dependencies between components, making them more reusable and testable. It also allows for easier substitution of different implementations of the same interface3.