A. With a custom UserDetailsService defined in the ApplicationContext, Spring Boot still creates the default user.

B. Passwords must be hashed and the default hashing algorithm is MD5.

C. User details can be stored in custom storage and retrieve them by implementing the UserDetailsService interface.

D. User details can be stored in a database, in LDAP, or in-memory.

E. The user details includes username and password but not authorities.

A. Call LegacySingleton.getInstance() from within a @Bean method and return the instance.

B. Return an instance of LegacySingleton using the new keyword from a @Bean method.

C. It is not possible without modifying the LegacySingleton class, the constructor must be public.

D. Modify the LegacySingleton class by adding the @Autowired annotation to the instance variable.

A. TestEntityManager provides all methods that are provided by EntityManager and more.

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

C. It can be used for testing both JPA components and NoSQL components.

D. It auto-configures a TestEntityManager bean.

E. It can be used for testing JdbcTemplate.

A. @SqlMergeMode(false)

B. @Rollback(false)

C. @Commit

D. @Sql(alwaysCommit=true)

E. @Transactional(commit=true)

A. @ConditionalOnBean(name= “dataSource”) should be replaced with @ConditionalOnBean (DataSource.class) for greater flexibility.

B. @ConditionalOnBean(name= “dataSource”) should be replaced with @ConditionalOnMissingBean (DataSource.class) for greater flexibility.

C. The @Bean annotation should be removed.

D. A JdbcTemplate bean will be created when the DataSource class is in the classpath but there is no DataSource bean.

E. A JdbcTemplate bean will be created when a bean named dataSource has already been created.

A. It is a meta-annotation on the @SpringBootApplication composed annotation.

B. It enables auto-configuration of the ApplicationContext by attempting to guess necessary beans.

C. It is meta-annotation on the @SpringBootConfiguration composed annotation.

D. It has the same effect regardless of the package of the class that is annotated with it.

E. It ensures auto-configuration is applied before user-defined beans have been registered.

A. If there is only one constructor the @Autowired annotation is not required.

B. Constructor injection only allows one value to be injected.

C. Constructor injection is preferred over field injection to support unit testing.

D. Construction injection can be used with multiple constructors without @Autowired annotation.

E. Field injection is preferred over constructor injection from a unit testing standpoint.

A. Repository

B. Messaging

C. Web

D. Container

E. Client

A. This syntax is invalid because the result of the getBean() method call should be cast to ClientService.

B. It will return a bean called ClientService regardless of its id or name.

C. This syntax is invalid because the bean id must be specified as a method parameter.

D. It will return a bean of the type ClientService regardless of its id or name.

A. CustomerRepository should be a class, not an interface.

B. JPA annotations are required on the Customer class to successfully use Spring Data JDBC.

C. An implementation of this repository can be automatically generated by Spring Data JPA.

D. A class that implements CustomerRepository must be implemented and declared as a Spring Bean.