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What is CPU? Write down the three functional un...

What is CPU? Write down the three functional units of a Central Processing Unit (CPU)?

What is CPU? Write down the three functional units of a Central Processing Unit (CPU)?

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Jeeba Mar. 07, 2018

The processor or CPU is like the brain of the computer that carries out the instructions of a computer program. It performs the basic arithmetical, logical, and input/output operations of a computer system.

The Central Processing Unit interprets and executes the program instructions and coordinates how all the other hardware devices work together.

The CPU is built on a small flake of silicon and can contain the equivalent of several million transistors. We can think of transistors as switches which could be “ON” or “OFF” i.e., taking a value of 1 or 0. The main function of CPU is to execute programs stored in memory. It consists of three functional units:


What is CPU? Write down the three functional units of a Central Processing Unit (CPU)?

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