A Java interface defines a set of ______ methods and is useful in separating the concept of an abstract data type from its implementation.
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Q17: _ is the process of deriving a
Q18: One purpose of inheritance is to _
Q19: _ and _ represent unusual or invalid
Q20: The messages printed by a thrown exception
Q21: Each _ on a try statement handles
Q23: All Java classes are derived, directly or
Q24: The toString and equals methods are defined
Q25: By using the interface name as a
Q26: If an exception is not caught and
Q27: The implementation of the collection operations should
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