Understanding functional and technical aspects of VMware Spring Professional 2021 Container, Dependency and IOC

The following will be discussed in VMWARE EDU-1202 exam dumps pdf:

• What is the behavior of the annotation @Autowired with regards to field injection, constructor injection and method injection?
• What can you reference using SpEL?
• How do you inject scalar/literal values into Spring beans? - What is @Value used for?
• What is an interface and what are the advantages of making use of them in Java?
• How many profiles can you have?
• Can you use @Component together with @Profile?
• How does the @Qualifier annotation complement the use of @Autowired?
• What is an ApplicationContext?
• Why are you not allowed to annotate a final class with @Configuration - How do @Configuration annotated classes support singleton beans? - Why can't @Bean methods be final either?
• How are you going to create an ApplicationContext in an integration test?
• What is the Environment abstraction in Spring?
• How do you configure profiles? What are possible use cases where they might be useful?
• What is a BeanPostProcessor and how is it different to a BeanFactoryPostProcessor?
• When/how will they get called? - How else can you define an initialization or destruction method for a Spring bean?
• What is Spring Expression Language (SpEL for short)?
• Are beans lazily or eagerly instantiated by default? How do you alter this behavior?
• What is a BeanFactoryPostProcessor and what is it used for? When is it invoked? - Why would you define a static @Bean method when creating your own BeanFactoryPostProcessor? - What is a PropertySourcesPlaceholderConfigurer used for?
• What is a property source? How would you use @PropertySource?
• What is a proxy object and what are the two different types of proxies Spring can create? - What are the limitations of these proxies (per type)? - What is the power of a proxy object and where are the disadvantages?
• What is the difference between $ and # in @Value expressions?
• What does component-scanning do?
• Can you describe the lifecycle of a Spring Bean in an ApplicationContext?
• Where can properties in the environment come from - there are many sources for properties - check the documentation if not sure. Spring Boot adds even more.
• What do they do? When are they called? - What is an initialization method and how is it declared on a Spring bean? - What is a destroy method, how is it declared and when is it called? - Consider how you enable JSR-250 annotations like @PostConstruct and @PreDestroy?
• What is dependency injection and what are the advantages of using it?
• How are you going to create a new instance of an ApplicationContext?
• Can you use @Bean together with @Profile?
• What does the @Bean annotation do?
• What is the preferred way to close an application context? Does Spring Boot do this for you? - Dependency injection using Java configuration? - Dependency injection using annotations (@Autowired)? - Component scanning, Stereotypes? - Scopes for Spring beans? What is the default scope?
• What is the default bean id if you only use @Bean? How can you override this?

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