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What is the primary function of the CPU in a computer system?
Question

What is the primary function of the CPU in a computer system?

A.

Connect input and output devices

B.

Execute instruc ons and process data

C.

Manage the power supply

D.

Store data permanently

Correct option is B

The correct answer is (B) Execute instructions and process data

Explanation:

  • The CPU (Central Processing Unit) is the "brain" of the computer, responsible for executing instructions and processing data.

  • It fetches instructions from memory, decodes them, and then executes the operations required.

  • The CPU handles arithmetic operations, logical operations, and manages the flow of data between different parts of the computer.

  • It plays a crucial role in coordinating and controlling the actions of all other hardware components in the system.

Information Booster:

  • Fetch-Decode-Execute Cycle: The CPU operates in a cycle where it fetches instructions from memory, decodes them, and executes the necessary operations.

  • ALU and CU: The CPU consists of the Arithmetic Logic Unit (ALU) for mathematical and logical operations, and the Control Unit (CU), which manages the execution of instructions.

  • Clock Speed: The speed at which the CPU processes instructions is determined by its clock speed, usually measured in GHz (gigahertz), indicating billions of cycles per second.

Additional Information:

  • Option A (Connect input and output devices): Incorrect. While the CPU controls the data flow, connecting input/output devices is primarily handled by the I/O controllers and motherboard.

  • Option C (Manage the power supply): Incorrect. The power supply is managed by the power supply unit (PSU), not the CPU.

  • Option D (Store data permanently): Incorrect. The CPU does not store data permanently; this function is handled by storage devices like hard drives, SSDs, or optical discs.

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