General Coding

Data Processing(DP) is specified as the conversion of raw data( or unprocessed data) into a meaningful result(processed knowledge) known as information. In order to produce the meaningful information(output) the data(input) must be collected and organized and some operation or processing must be applied on it. Generally, a DP is combination of machine, people and process that for set of inputs produces a defined set of output , which is also is called DP-System. This System involves the functions- conversion, validation, sorting, aggregation,analysis and reporting. Depending on the methods and technology DP can be categorized into 3 type or levels: Manual DP Machine DP Electronic DP

Interrupt can be termed as signal send by the hardware to processor. The signal tells that hardware is ready. When an interrupt signal comes, the processor stops or suspend what it is doing and give attention to the signal. Processor is the central unit of a computer. Computer consist number of devices, input/output devices. Every devices are controlled and monitored by CPU. This is done by checking the status of every devices attached. For instance, CPU checks the status of the keyboard, printer, monitor to see if it is ready or not. Ready means if the user is typing, keyboard is ready and CPU give attention to device and if the user wants to print some thing CPU checks the status of the printer. If it is ready then execute some routine to perform the printing task.But the typing