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What is CPU in computer? What are the functions of CPU in computer?


CPU (Central Processing Unit) in computer:

CPU or central processing unit in computer is an electronic circuitry that carries out the instruction given by a computer program. CPU in computer execute instruction by performing basic arithmetic, logical, control and I/O operations as required per instruction. CPU in computer is considered to be the brain of the computer. The speed and efficiency of a computer mostly depends on it's CPU.


Suggesting Reading:
  1. What are the steps followed by a CPU to execute an instruction?


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Functions of CPU in computer: 

  1. Controlling all other parts of the machine and sending timing signals.
  2. Transferring data between memory and I/O devices
  3. Fetching data and instructions from memory
  4. Decoding instruction
  5. Performing arithmetical and logical operations
  6. Executing programs stored in memory
  7. Performing communication among the I/O devices etc.
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