In performing ____ on pointers, we must be careful to produce addresses that point to something meaningful.

You can tap the ____________________ keys to move the insertion point to the next placeholder.

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

While adjusting the width and the height of an image in a graphics editor, one should maintain the _________ to avoid distortion of the image.?

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