Question

The arguments to a copy constructor _____________

(a) Must be const

(b) Must not be cosnt

(c) Must be integer type

(d) Must be static

Answer 1

The correct answer is (a) Must be const

To explain I would say: The object should not be modified in the copy constructor. Because the object itself is being copied. When the object is returned from a function, the object must be a constant otherwise the compiler creates a temporary object which can die anytime.