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Answer Posted / alameen
In "single inheritance," a common form of inheritance,
classes have only one base class. Consider the relationship
illustrated in the following figure.
Simple Single-Inheritance Graph
Note the progression from general to specific in the
figure. Another common attribute found in the design of
most class hierarchies is that the derived class has
a "kind of" relationship with the base class. In the
figure, a Book is a kind of a PrintedDocument, and a
PaperbackBook is a kind of a book.
One other item of note in the figure: Book is both a
derived class (from PrintedDocument) and a base class
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