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Inheritance in class diagrams is depicted by________

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Inheritance in class diagrams is depicted by________

(a) single-headed empty arrow

(b) single-headed filled arrow

(c) double-headed empty arrow

(d) double-headed filled arrow

The question was asked during an interview.

My question comes from Object and Design-2 topic in portion Object Tools and Design and Variables in PHP of PHP

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The correct answer is (a) single-headed empty arrow

To explain: The UML describes the inheritance relationship as a generalization. This relationship is signified by a line leading from the subclass to its parent. The line is tipped with an empty closed arrow.

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