In a high resolution mode, the number of dots in a line will usually be ----
In a high resolution mode, the number of dots in a line will usually be 640.
The term display mode refers to the characteristics of a computer display, in particular the maximum number of colors and the maximum image resolution (in pixels horizontally by pixels vertically).It allowed up to 16 different colors and offered resolution of up to 640 x 350.
Resolution is how many pixels the monitor can display at a given time. The smallest resolution Windows supports is 640x480 pixels (meaning 640 dots horizontally by 480 vertically). Better video cards and monitors are capable of much higher resolutions. The standard resolution used today is 1024x768.