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C++ MCQs

What's a benefit of declaring the parameter as a const reference instead of declaring it as a regular object? int median(const my_array& a);

The argument is passed as a reference, so the function receives a copy that can be modified without affecting the original value.

The argument is passed as a reference, so if the passed my_array object is large, the program will require less time and memory.

Actually objects can't be passed as regular variables because they require a constructor call. Therefore a const reference is the only way to pass class instances to functions.

There are no benefits because a reference and an object are treated as the same thing.

Answer

Correct Answer: The argument is passed as a reference, so if the passed my_array object is large, the program will require less time and memory.

Explanation:

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