Adaface Sample Spring Questions

Review the following two Spring components- SampleA and SampleB:

Notice @Autowired line added to SampleService in SampleB (rest of the code is same for both components). What happens when the components are run as a @SpringBootApplication?

A: SampleA prints true null
            B: SampleA prints true class package.SampleService
            C: SampleA throws a null pointer exception
            D: SampleA prints false null
            
            E: SampleB prints true null
            F: SampleB prints true class package.SampleService
            G: SampleB throws a null pointer exception
            H: SampleB prints false null

Spring allows specific operations to be performed after the bean is initialized and before the bean is destroyed. Review the following sample Bean that implements init method and overrides afterPropertiesSet. 

Here’s the bean definition added to the configuration file:

What does the code print when the Spring container is started?

Review the following Spring Boot application code:

Here are two possible SampleConfig class definitions:

When the code is run as @SpringBootApplication, what would happen?
            
            A: Using X as SampleConfig will print- true SimpleDateFormat
            B: Using X as SampleConfig will print - true class java.text.SimpleDateFormat
            C: Using X as SampleConfig will print a NullPointerException stacktrace
            D: Using X as SampleConfig will print a BeanDefinitionParsingException stacktrace
            
            E: Using Y as SampleConfig will print- true SimpleDateFormat
            F: Using Y as SampleConfig will print - true class java.text.SimpleDateFormat
            G: Using Y as SampleConfig will print a NullPointerException stacktrace
            H: Using Y as SampleConfig will print a BeanDefinitionParsingException stacktrace