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Major Function of Input and Output Devices Points : major function of input and output devices Major Function of Input Device These are physical equipments that read or translate data consisting of alphabets, number or other symbols into electronic impulses, which can be understood by the computer. The purpose of input devices is to pass information into the memory unit of the CPU. It converts the characters letters, numbers and other symbols into binary pattern. Major Function of Output Device: The output devices are physical equipment, which present the out come of the computations and related activities carried out in the CPU so that these can be understood by humans. The purpose of the output devices is to convert data and information expressed in electronic impulses to human understandable forms such as printed report.

Functional Units of Computer Points : functional units of computer, input unit, central processing unit (cpu), function of a cpu:, output unit, hard copy and soft copy Functional Units of Computer A micro computer consists of several components, each containing mechanical and electronic equipments. There are three basic components of a computer. i. Input unit ii. Central Processing Unit iii. Output Unit i. input Unit: In order to process data, a computer must have the ability to receive this data. The elements of a computer system, which enter the data into the computer are known as Input unit. The function of input unit is to feed data or information and a set of instructions into the computer. The most common input devices is the Keyboard and the mouse. Central Processing Unit (CPU) Central Processing Unit (CPU) is the brain of computer system. We use CPU to control all input and output connections inside and outside of computer to produce correct answers for the user. It contr

Difference Between Internal And External Memory Points : difference between internal and external memory, comparision between internal and external memory Difference Between Internal And External Memory Internal Memory External Memory 1. Internal memory is also known as primary storage or main memory. External memory is also known as secondary, Auxiliary or backing storage. 2. It is volatile in nature in case of RAM but ROM is non-volatile. It is non-volatile in nature. 3. It is connected by inserting chips into sockets in case of RAM while ROM is built in into the computer. They are connected by data cable and power cable with the computer. 4. It is used to store data temporary in case of RAM. They are use to score data permanently for future used. 5. It consists of media only. It consist of media and device. 6. Internal memory is a working memory. External memory is not a working memory. 7. Examples are RAM and ROM. Examples are hard disk, floppy disk, magnetic tape, cassette etc.