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A copy constructor is invoked when:

(A) a function returns by value        

(B) an argument is passed by value

(C) a function returns by reference 

(D) none of the above

in Object Oriented Programming by Loyal (7.3k points)
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Is it option d) ?

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In C++, a Copy Constructor may be called in following cases:
1. When an object of the class is returned by value.
2. When an object of the class is passed (to a function) by value as an argument.
3. When an object is constructed based on another object of the same class.
4. When compiler generates a temporary object.


Hence, ans B
by Loyal (7.3k points)
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