Swimal Shah CIS 549-4297 Cloud Computing Environment Summer Quarter, 2016 Assignment 5 Q 1. What is a common use of dumb terminals? > A dumb terminal, also called a video display terminal (VDT), has a display screen and a keyboard and can input and output but cannot process data. Usually this terminal is used for getting information only. The output is a text only from this terminal. For instance, airline reservations clerks use these terminals to access mainframe computer containing flight information. Q 2. What characteristics determine the clarity of a computer screen? > The factors, affecting screen clarity, are dot pitch, resolution, color depth, and refresh rate. These relate to the individual dots on the screen known as pixels, which represent the images on the screen. A pixel, for “picture element,” is the smallest unit on the screen that can be turned on and off or made different shades. Pixels are tiny squares, not circles. Dot pitch: Dot pitch (dp) (also called pixel pitch) is the amount of space between the centers of adjacent pixels; the closer the pixels, the crisper the image. For a 0.25-dp monitor, for instance, the dots (pixels) are 25/100ths of a millimeter apart. Generally, a dot pitch of 0.25–0.28 will provide clear images. Resolution: Here resolution refers to the image sharpness of the display screen; the more pixels, or dots, there are per square inch, the finer the level of detail. As with scanners, resolution is expressed in dots per inch (dpi), the number of columns and rows of dots (pixels) per inch. Generally, the higher the number of dots, the clearer and sharper the image.
- Summer '17
- ALBERT DOMINIC
- Color depth, Refresh rate, Source dataentry devices