Which Of The Parts Of A Computer Executes The Program Instructions?

The CPU, GPU, and RAM all execute the instructions of a program, but they each do so in different ways. This article explains how each part works.

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The Central Processing Unit

The central processing unit (CPU) is the part of a computer that carries out the instructions of a program. It is the “brain” of the computer. The term has been used in the computing industry since the early 1960s.

A CPU consists of two parts: the control unit (CU) and the arithmetic logic unit (ALU). The ALU performs arithmetic and logical operations, while the CU controls the sequence of operations performed by the ALU and other computer parts.

The Python programming language has an “execution tracing” feature that lets you see exactly what parts of a program are being executed as it runs. This can help understand how a program works or debug programs that are not working as expected.

The Arithmetic Logic Unit

The Arithmetic Logic Unit, or ALU, is a digital circuit that performs arithmetic and logic operations on data. Arithmetic operations include addition, subtraction, multiplication, and division. Logic operations include AND, OR, XOR, and NOT. The ALU is a fundamental part of a computer’s central processing unit (CPU) or microprocessor.

The Control Unit

The control unit is the part of a computer that executes the program instructions. It is sometimes referred to as the brain of the computer.

The control unit is also responsible for managing the flow of information between the different parts of the computer. For example, when you ask your computer to calculate something, the control unit will fetch the necessary data from memory, perform the calculations, and then store the results in memory.


A computer has three main parts that work together to execute programs: the central processing unit (CPU), memory, and input/output devices. The CPU is the computer’s brain and does all the computations, while memory temporarily stores data that the CPU needs quick access to. Input/output devices include keyboards, mice, monitors, and printers; they allow humans to interact with the computer.


A computer’s input/output (I/O) is responsible for executing the program instructions. The I/O part consists of the central processing unit (CPU) and the memory. The CPU is the brain of the computer, and it is responsible for executing the program instructions. The memory is where the programs and data are stored.


The CPU is the one part of a computer that executes program instructions. This makes it the essential part of a computer and will most likely be upgraded when a faster machine is desired.

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