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How many ways of reusing are there in the class hierarchy?

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How many ways of reusing are there in the class hierarchy?

(a) 1

(b) 2

(c) 3

(d) 4

This question was addressed to me during an online exam.

My doubt is from Design of Class Hierarchies topic in division Derived Classes, Templates & Exception Handling in C++ of C++

1 Answer

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Best answer
The correct choice is (b) 2

Easiest explanation - Class hierarchies promote reuse in two ways. They are code sharing and interface sharing.

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