TabControl objects, which are placed on top of button objects, enable multiple tabs to appear on a form.

The most important and widely used stream cipher is __________ .

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

Select which of the following are required of HTML elements:

(i) they must be properly nested (ii) they must be closed (iii) they must be typed in lowercase (iv) they must all have root elements a. (i) only b. (ii) only c. (iii) only d. (iv) only e. (i) and (ii) f. (i), (ii), and (iii) g. All 4 h. (ii) and (iv)