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 * `IntBinaryOperator`- binary operator receiving input Integer;
 * `LongBinaryOperator`- binary operator receiving input Long.
 
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 #### Q. What are the functional interfaces `Predicate<T>`, `DoublePredicate`, `IntPredicateand` `LongPredicate`?
 `Predicate<T>`(**predicate**) - the interface with which a function is implemented that receives an instance of the class as input `T`and returns the type value at the output `boolean`.