What is the brain of a computer? What are its sub-components?



The CPU is often referred to as the brain of the computer. CPU carries out the processing of data. It performs arithmetic and logic operations. 

The subcomponents of CPU are:

  • Arithmetic Logic Unit (ALU) - performs all the arithmetic and logic operations that need to be done as per the instruction in a program.
  • Control Unit - controls sequential instruction execution, interprets instructions and guides data flow through the computer’s memory, ALU and input or output devices. 
  • Registers - Register is a small amount of very fast memory. They are limited in size and number. 


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Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.