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How many constructors can present in a class?

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How many constructors can present in a class?

(a) 1

(b) 2

(c) 3

(d) multiple

The question was posed to me in exam.

My question is from Class Hierarchies and Abstract Classes topic in section Derived Classes, Templates & Exception Handling in C++ of C++

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Best answer
The correct answer is (d) multiple

For explanation: There can be multiple constructors of the same class, provided they have different signatures.

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