#interfaces
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What is Functional Interface? If an interface contains only 1 abstract method, that is known as Functional Interface. Alos known as SAM interface...
1. Default Method (Java 8) Issue Before Java8, Interface can have only Abstract method. And all child classes has to provide abstract method...
AbstractInterface Declaration keywordabstractinterface Objects can be created?NoNo Contains Abstract and concrete methods?BothOnly Abstract...
