A _____ is a snapshot of your computer settings, or essentially a backup of the Windows Registry.

Which of the following is equivalent to this code segment?

``` int total = 0; for (int i = 0; i <= 20; i += 2) { total += i; } ``` a. int total = 0; for (int i = 20; i < 0; i += 1) { total += i; } b. int total = 0; for (int i = 0; i <= 20; total += i, i += 2) {} c. int total = 0; for (int i = 0, i <= 20, total += i; i += 2) {} d. int total = 0; for (int i = 2; i < 20; total += i, i += 2) {}

A(n) _________________________ is a character, like the ones in the accompanying figure, that Word displays on the screen but is not visible on a printed document.

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