QUESTION: 21

Given an ApplicationContext containing multiple bean definitions of a Java type "Foo", which of the following @Autowired scenarios will cause the ApplicationContext to FAIL to initialize? Assume that the ApplicationContext is configured to process the @Autowired annotations. (Select one)

@Autowired public void setFoo(Foo aFoo) {}
@Autowired private Foo foo;
Both a and b
Neither a or b

Answer(s): C

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QUESTION: 22

Which of the following are valid mechanisms of autowiring a dependency when multiple beans match the dependency’s type? (Select one or several answers)

Use of the @Qualifier and @Autowired annotations together on a field
Use of the @Qualifier and @Autowired annotations together with setter methods
Use of the @Qualifier annotation solely

Answer(s): A,B

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QUESTION: 23

Which of the following statements is NOT true concerning Setter Injection or Constructor Injection? (Select one)

Constructor injection is useful when you must have an instance of a dependency class before your component is used
Setter injection is useful if a component can provide its own defaults
Using the @Autowired annotation, setter injection also works when the setter method is private
Using setters promotes immutability

Answer(s): D

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QUESTION: 24

If you annotate one of your classes with @Component, which of the following should you do to have Spring automatically detect your class and load it as a bean? (Select one or several answers)

Ensure that you specify a valid bean name in the @Component annotation
Ensure that you specify a valid @Scope for the bean
Ensure that you have added <context:component scan> in the XML configuration
Ensure that <context: annotation-config/> is specified in the XML configuration

Answer(s): C

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