All complex operations are done by making repetitive use of the above operations. This unit consists of two subsections namely,įunction of arithmetic section is to perform arithmetic operations like addition, subtraction, multiplication, and division. It communicates with Input/Output devices for transfer of data or results from storage. It obtains the instructions from the memory, interprets them, and directs the operation of the computer. It manages and coordinates all the units of the computer. It is responsible for controlling the transfer of data and instructions among other units of a computer. This unit controls the operations of all parts of the computer but does not carry out any actual data processing operations. It stores the final results of processing before these results are released to an output device.Īll inputs and outputs are transmitted through the main memory. It stores intermediate results of processing. It stores all the data and the instructions required for processing. Primary memory and secondary memory are two types of memories in the computer. Its size affects speed, power, and capability. It is also known as internal storage unit or the main memory or the primary storage or Random Access Memory (RAM). This unit supplies information to other units of the computer when needed. This unit can store instructions, data, and intermediate results. It controls the operation of all parts of the computer.ĬPU itself has following three components.It stores data, intermediate results, and instructions (program).CPU performs all types of data processing operations.CPU is considered as the brain of the computer.Central Processing Unit (CPU) consists of the following features −
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