When you call a string's split method, the method divides the string into two substrings.

____________________ serves as an interface between two OSs, such as Linux and Windows, by using the protocols Server Message Block and Common Internet File System, which allow sharing information and resources between different OSs.

Fill in the blank(s) with the appropriate word(s).

The ____ screen appears when you start Windows, switch users, or put Windows to sleep.

A. Safekeep B. Lock C. Security D. Private