explain any four of the following terms in the context of input / output technologies
1 SCSI
2 scan codes in keyboard
3 resolution of display devices
4 colour depth in display devices
5 drive cache
6 print resolution
Answers
Answer:
1.The Small Computer System Interface (SCSI) is a set of parallel interface standards developed by the American National Standards Institute (ANSI) for attaching printers, disk drives, scanners and other peripherals to computers. SCSI (pronounced "skuzzy") is supported by all major operating systems.
2.A scancode (or scan code) is the data that most computer keyboards send to a computer to report which keys have been pressed. A number, or sequence of numbers, is assigned to each key on the keyboard.
3.A computer monitor's resolution refers to the approximate number of pixels the device is capable of displaying. It's expressed as the number of horizontal dots by the number of vertical dots; for example, an 800 x 600 resolution means the device can show 800 pixels across by 600 pixels down.
4.a cache that stores copies of frequently used disk sectors in random access memory (RAM) so they can be read without accessing the slower disk
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