Which of the following C++ operators CANNOT be overloaded?

Answer: Scope resolution (::) cannot be overloaded. Reason: The scope resolution operator (::) is used by the compiler for compile-time name lookup and binding. Because its behavior is part of the language's name resolution mechanism, it cannot be redefined or overloaded by user code. Other operators that the language does not allow you to overload include: Member access operator (.) — cannot be overloaded.