Java Annotations · interview question
Why do teams use a @Retention annotation in custom annotations in production code?
Multiple choiceEasychapter-16-curatedpremiumjava-annotationscustom-annotations
Answer and explanation
Correct answer
A. To define how long the annotation should be retained
Why
The @Retention annotation specifies how long annotations should be retained. The possible retention policies are SOURCE, CLASS, and RUNTIME, with RUNTIME being necessary for reflection.
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