SQL Server can generate a self-signed ______________ to encrypt data.

To clear the show plus sign flag but leave the rest of the flags alone, you use the _____________ member function and argument.

a) ``` setf(! ios::showpos); ``` b) ``` setprecision(ios::showpos); ``` c)``` unsetf(ios::showpos); ``` d) ``` setf(ios::showneg); ``` e) ``` unsetf(! ios::showneg); ```

C++ provides a header file called ____________________, which is used for file I/O.

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