Which of the following statement is correct with respect to CPU?

Answer: The CPU controls all other parts of the computer.

Explanation: The Central Processing Unit (CPU) is the primary component that fetches, decodes, and executes instructions and coordinates the operation of all other hardware.

• Control Unit (CU): coordinates and controls the CPU and the computer by fetching and decoding instructions and issuing control signals to memory, input, and output devices.

• Arithmetic Logic Unit (ALU): performs arithmetic and logical operations on data as directed by instructions.

• Registers: small, fast storage locations inside the CPU that hold instructions, data, and intermediate results during processing.

• Main memory (RAM): stores programs and data while they are being used; this is separate from the CPU itself.

Why the other statements are incorrect:

• The claim that the CPU is controlled by the Control Unit and instructs input/output devices is misleading: the Control Unit is part of the CPU and issues control signals to I/O devices; it does not exist outside the CPU to control the CPU.

• The claim that the CPU is the unit that stores instructions and data confuses memory with processing. Storage is provided by memory (and registers inside the CPU), while the CPU executes instructions.

• The claim that the CPU is part of the ALU reverses the relationship: the ALU is a component inside the CPU that performs arithmetic and logic operations.