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In Spring, which of the following is the correct way for using idref attribute?

A) Setter method
B) Constructor argument
C) Setter method and Constructor argument
D) Arguments

Ans. C) Setter method and Constructor argument

Explanation

The ‘idref’ attribute in Spring is used to refer to the id of another bean. This can be used in both the Setter method and Constructor argument, providing flexibility in bean configuration.

1) Setter method: This is the traditional way of setting bean properties using setter methods.

2) Constructor argument: This method sets the properties through the constructor when the bean is created.

Using both methods, idref ensures that the reference is correctly set up in a type-safe manner. This is useful in various scenarios where beans need to be wired together during the initialization phase.

Why Other Options are Not Correct?

Setter method only: While the setter method can be used, it alone does not cover all use cases, especially when dependencies need to be injected at the time of bean instantiation.

Constructor argument only: Similarly, relying solely on the constructor argument limits the flexibility of configuring beans, particularly in complex dependency injection scenarios where setter injection might be more appropriate.

Arguments: This is not a valid option in the context of Spring’s idref attribute usage. The term “arguments” is too vague and does not specifically pertain to the Spring configuration methods.

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