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INFORMATION PROCESSING CYCLE
Transcript of INFORMATION PROCESSING CYCLE
information (output). Computers carry out
processes using instructions, which are the steps
that tell the computer how to perform a particular
task. A collection of related instructions
organized for a common purpose is referred to
as software. A computer often holds data, information,
and instructions in storage for future
use. Some people refer to the series of input,
process, output, and storage activities as the
information processing cycle. Input devices For every instruction, the control unit repeats a set of four basic operations called the machine cycle:
Fetching – process of obtaining a program instructions or data item from memory.
Decoding – process of translating a program instruction into signal that a computer can execute.
Executing – process of implementing the instructions in a program.
Storing – process of writing the result to the storage or memory. Process Inormation Processing Cycle What is Information Processing Cycle?? When data is entered in the computer system, it is called an input. Input comes in various forms; texts, graphics, audio and video.
Example : keyboard, mouse, scanner, digital camera and barcode reader. Output devices
Output is a result of raw input data that has been processed by the cpu into meaningful information. Common forms of output; texts, numbers, graphics, sounds, animations and videos.
Example : computer screen, speaker and printer. Storage devices
System primary storage is RAM, but it can only hold data temporarily. Thus, secondary storage is needed to provide additional storage and the data stored in it is consider permanent until it is deleted.
Example : hard disks, rewritable CDs and DVDs, diskettes and pen drive. Central Processing Unit (CPU)
CPU is the brain of computer. All processing activities are done in the CPU.
The processor must be connected to input devices, output devices and storage devices to carry out task.