What is a CPU?
What is a CPU? CPU( Central Processing unit) It is the most important unit of the computer system. CPU is considered as the brain of computer. in human body, all major decisions are taken by the brain and all other parts of the body function as directed by the brain. Similar to the human brain, in computer system, all major calculations, manipulations and comparisons are made by the CPU. The CPU is also responsible for activating and controlling the operations performed by all other units of the computer system. Central Processing Unit The major parts of a CPU are: a) Arithmetic and Logical Unit (ALU) b)Control Unit (CU) c)Memory Unit (MU) Arithmetic Logic Unit(ALU) It performs all the mathematical and logical operations.The data and instructions, stored in the primary memory, are transferred to ALU for processing. Results generated by the ALU is transferred to the primary memory. After completion of processing, the final results are sent to an output device. ALUs are designed to ...