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Not frequently asked as it was introduced with Java 8. | ||||
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Ans. This is an informative annotation that specify that the interface is a functional interface. A Function Interface has only one abstract method and many default methods. Compiler generates an error if the interface specified with the annotation doesn't abide by the specifications for functional interface. | ||||
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Like Discuss Correct / Improve  java   java8   java 8   functional interface   default methods | ||||
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How do you define a functional interface? | ||||