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The command of a computer is mainly executed by 

  • A.Arithmetic and logical unit
  • B.Control unit
  • C.Memory unit
  • D.All of the above

Answer: A

Correct answer: Arithmetic and logical unit

Executing a command means actually performing the operation it specifies, and that is the ALU's work. The control unit decides what shall be executed and when, but the execution itself happens in the ALU.

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