Interface can be defined as a common boundary between two times, either hardware or software. When ever we talk about man and machine (computer) interface, it refers to the way how they response to each other at every step through some common media between them. So, the interface allows communication between man (user) and the computer.
When ever man has to interface with the computer (machine), he has to feed the data or instruction to the computer in such a format that a computer can understand. The feeding of data to the computer is performed through the input devices like keyboard, mouse, optical reader etc.
These data and instruction are sent to the memory unit. The memory unit stores those data and instruction.
If data has to be processed the intermediate result is also stored in the memory. The operations (i.e. arithmetic calculations and logical operations) on data and instruction are performed inside the processor.
For these purpose the computer has a Central Processing Unit (C.P.U.) comprising of a control unit and Arithmetic and Logic Unit (A.L.U.) and Primary memory. The Control Unit (C.U.) interprets each of the instructions stored in the memory. It also directs the various units to carry out the jobs assigned to them in a correct sequence. Sometimes arithmetic calculation and logical decisions are to be done. The arithmetic and logic unit calculates and takes the logical decisions. After finishing such operations the output unit writes out the results (shows the outputs).
The output could be shown on the screen (computer) or it could be printed on the printers. The results or outputs are observed by the concerned person. If the result of the whole operation is correct, then the person may ask the computer to do the next job, again giving instruction and data to the computer otherwise he may repeat the same job with correct data and instructions.
During the interfacing, if the instruction does not have correct syntax or if data is not in the defined format, then the computer will show some error message, drawing the attention of the person who has given instruction or data. Similarly, if the result given by the computer is not in the desired format, it may not be meaningful to a person so either the given input instructions are not able to generate the desired result or any malfunctioning has occurred inside the computer.
When ever man has to interface with the computer (machine), he has to feed the data or instruction to the computer in such a format that a computer can understand. The feeding of data to the computer is performed through the input devices like keyboard, mouse, optical reader etc.
These data and instruction are sent to the memory unit. The memory unit stores those data and instruction.
If data has to be processed the intermediate result is also stored in the memory. The operations (i.e. arithmetic calculations and logical operations) on data and instruction are performed inside the processor.
For these purpose the computer has a Central Processing Unit (C.P.U.) comprising of a control unit and Arithmetic and Logic Unit (A.L.U.) and Primary memory. The Control Unit (C.U.) interprets each of the instructions stored in the memory. It also directs the various units to carry out the jobs assigned to them in a correct sequence. Sometimes arithmetic calculation and logical decisions are to be done. The arithmetic and logic unit calculates and takes the logical decisions. After finishing such operations the output unit writes out the results (shows the outputs).
The output could be shown on the screen (computer) or it could be printed on the printers. The results or outputs are observed by the concerned person. If the result of the whole operation is correct, then the person may ask the computer to do the next job, again giving instruction and data to the computer otherwise he may repeat the same job with correct data and instructions.
During the interfacing, if the instruction does not have correct syntax or if data is not in the defined format, then the computer will show some error message, drawing the attention of the person who has given instruction or data. Similarly, if the result given by the computer is not in the desired format, it may not be meaningful to a person so either the given input instructions are not able to generate the desired result or any malfunctioning has occurred inside the computer.
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