Learn Java from Scratch - A Beginner's Guide - Step 14 - Spring Framework Bean Auto Wiring - Primary and Qualifier Annot

The video tutorial addresses two main questions regarding Spring Framework: how to list all beans managed by the framework and how to handle scenarios where multiple matching beans are available. It explains the use of context methods to list beans and discusses handling exceptions when multiple beans match a type. The tutorial also covers using @Primary and @Qualifier annotations to prioritize beans and resolve conflicts, providing practical examples and code snippets.

What is the primary focus of the initial questions discussed in the video?

• How to use Spring Security

• How to deploy a Spring application

• How to list and manage beans in Spring

• How to configure Spring Boot

Which method is used to retrieve the names of all beans defined in the Spring context?

• getBeanNames()

• getBeanDefinitionNames()

• listAllBeans()

• retrieveBeanNames()

What programming paradigm is used to loop through and print bean names?

• Object-oriented programming

• Procedural programming

• Aspect-oriented programming

• Functional programming

What exception is thrown when multiple matching beans are found?

• NoUniqueBeanDefinitionException

• BeanInstantiationException

• BeanCreationException

• NoSuchBeanDefinitionException

How can you prioritize one bean over others when multiple beans match?

• By using @Service

• By using @Component

• By using @Autowired

• By using @Primary

What is the purpose of the @Primary annotation?

• To disable a bean

• To log bean creation

• To indicate a bean should be used as the default

• To mark a bean as deprecated

What alternative to @Primary can be used to resolve bean conflicts?

• @Autowired

• @Qualifier

• @Service

• @Component

How does the @Qualifier annotation help in resolving bean conflicts?

• By specifying a default bean

• By providing a specific name to distinguish beans

• By disabling other beans

• By logging bean usage

What happens if you try to auto-wire a bean without specifying a qualifier when multiple beans are available?

• The first bean will be selected

• An exception will be thrown

• A random bean will be selected

• The application will crash

What is the result of using both @Primary and @Qualifier annotations on beans?

• Both annotations will be ignored

• The application will not compile

• The @Primary bean will always be chosen

• The @Qualifier will override @Primary