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Input unit: These are used to read data and transfer to primary memory contained in CPU through keyboard or floppy disk or mouse etc.Central Processing Unit (CPU): This consists of three divisions. They are:
1) Primary memory unit: This memory unit allows computer to store the data orinstruction read by input devices or data obtained by calculations in the program.
2) Control unit: This controls unit directs the operations of all units. This unit decodes and executes the instructions given in the program.
3) Arithmetic logic unit: This performs basic arithmetic operations like adding, subtracting, multiplicating, dividing and uses trigonometrical functions. It can also perform logical operations like comparing two variables, justifying the conditions. It can take many logical decisions.Secondary memory or storage unit: These are external storage units and store data or program permanently on magnetic disk and magnetic tape.
Output unit: Output unit is used to take data from primary memory and writes it on output devices like video display unit or printer etc. All these physical units and various other equipments in which the computer is made of is called ‘hardware'. The sequence of instructions given to a computer to solve any problem is called ‘software'.
RANDOM ACCESS MEMORY (RAM): The RAM-type memory will allow data to be written into it, as well as read from it. With very few exceptions, RAMS lose their contents when the powe
Memory Management: The purpose of the memory management system is to load programs into memory in such a way as to give each program loaded the memory that it requires for
Disadvantages of Manual Records More manpower is required to record/storelretrieve the data. Bulky paper records take up more space and this problem increases with
QUESTION (a) Using diagrams, describe the 2-tier and 3-tier architectures. (b) What is a middleware? Explain the functions of a middleware. Give two examples of middleware.
Need of operating system: What kind of facilities operating system provides to the users and programs: The operating system provides interfaces for the user (keyboard, m
Input and Output Devices : The most common input devices that you will see in your PC are the keyboard and the mouse. The keyboard of the computer looks like the keyboard o
even though most systems only distinguish among user and kernel modes, some CPUs provide multiple modes. Multiple modes could be used to provide a finer-grained security strategy.
discuss the three major challenges in building information system in an organization
For a processor to be able to process an instruction, it requires to be able to determine what the instruction is asking to be carried out. For this to take place, the CPU requires
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