The algorithm for a clock uses a nested repetition structure.

An attacker wearing a building maintenance uniform approached a company's receptionist asking for access to a secure area. The receptionist asks for identification, a building access badge and checks the company's list approved maintenance personnel prior to granting physical access to the secure are.The controls used by the receptionist are in place to prevent which of the following types of attacks?

A. Tailgating B. Shoulder surfing C. Impersonation D. Hoax

A(n) ____ function is a nonmember function that has access to all members of the class.

A. access B. protected C. friend D. void