What is computer data processing ? Computer data processing is any process that a computer program does to enter data and summarize, analyze or otherwise convert data into usable information. The process may be automated and run on a computer. It involves recording, analyzing, sorting, summarizing, calculating, disseminating and storing data. http://en.wikipedia.org/wiki/Computer_data_processing
Data Processing CycleInput Process Output http://www.slideshare.net/ballplayer23/data-processing-7798780
Expanded Data Processing Cycle Origination Input Process Storage Output Distribution
How Computer Process Data ?Processing takes place in PC’s Central Processing Unit (CPU). The System’s memory also play in crucial role in processing data. Both CPU and memory are attach to system’s motherboard, which connect all the computer device together, enabling them to communicate. http://www.presentationmagazine.com/free-powerpoint-sound-clips-11831.htm
Two basic Parts of CPU • Control Unit The control unit directs the flow of data through the CPU, and to and from other devices. • Arithmetic logic Unit The ALU is connected to a set of register – small memory areas in the CPU, which hold the data and program instructions while there are being process. http://www.brainybetty.com/soundsforpowerpoint.htm
Machine Cycle• The CPU follow a set up of steps-called a machine cycle for each instruction it carries out.• By using techniques called pipelining, many CPU’s can process more than one instruction at a time. http://office.microsoft.com/en-us/powerpoint-help/add-
The Machine Cycle includes two smaller cycle:During the instruction cycle, the CPU“fetches” a command or data from memoryand decodes it for the CPU.During the execution cycle, the CPUcarries out the instruction, and may storethe instruction’s result in memory.
The Role of Memory• RAM store data and program code needed by CPU. The contents of RAM change rapidly and often.• Read-only memory (ROM) is nonvolatile (or permanent). Its hold instruction that run the computer when the power is turned on.• The CPU accesses each location in memory by using a unique number, called memory address http://www.123ppt.com/faqs/sound-effects-background-music.asp
Factors that Affect Processing Speed• The size of CPU’s Registers (word size) determines how much data the computer can process at one time .• The more RAM has pc has, the more program instruction and data can held in the memory.• The system clock sets the pace for the CPU. Speed is measured in hertz (Hz), or cycles in second.
• A bus is a path between the components of the computer, on which the data and instruction are travel. The wider the bus , the more data it can carry.• Cache memory is high-speed memory that’s hold most recent data and instructions that have been loaded by the CPU.