What constitutes a CPU? Does it consist of memory and outputs? Assess the statement: “The CPU (Central Processing Unit) is composed of memory and outputs.” Decide if this is a correct description of CPU composition.

Introduction / Context:
Understanding what a CPU is versus what surrounds it (memory and I/O) is foundational in computer architecture. The CPU executes instructions using internal functional blocks and communicates with, but does not equal, the memory and output peripherals.

Given Data / Assumptions:

• “CPU” refers to the processing core of a computer system.
• Memory (RAM/ROM) and I/O (inputs/outputs) are external subsystems, though they may be integrated on the same chip in microcontrollers.
• Internal CPU elements include ALU, control unit, registers, and buses.

Concept / Approach:
A CPU comprises an arithmetic logic unit, control logic (instruction decode/sequencing), and a register file; it may also include caches. Memory and I/O are separate architectural elements accessed via buses. Even in SoCs or microcontrollers, we distinguish the CPU core from the on-chip memory and peripherals; integration does not redefine the CPU’s composition.

Step-by-Step Solution:

Verification / Alternative check:
Block diagrams in architecture textbooks show CPU as a distinct block interfacing with memory and I/O, not consisting of them.

Why Other Options Are Wrong:

Common Pitfalls:
Equating “integrated on one chip” with “part of the CPU.” Integration does not change architectural roles.

Final Answer:
Incorrect