In computer architecture, are instructions, data, and intermediate/final results during processing held in the Arithmetic Logic Unit (ALU)?

Introduction:
This concept question distinguishes the roles of core CPU components: the Arithmetic Logic Unit (ALU), registers, cache, and main memory. It checks whether learners know that storage and computation are distinct responsibilities.

Given Data / Assumptions:

• Statement claims ALU 'holds' instructions, data, and results during processing.
• Context: von Neumann architecture with typical CPU organization.

Concept / Approach:

The ALU performs arithmetic and logical operations. It does not serve as a storage repository. Instructions are fetched from memory (possibly via cache) and decoded by the control unit. Operands and results are temporarily stored in registers (e.g., accumulator, general-purpose registers) and caches; long-term storage is in main memory or secondary storage. The ALU interacts with registers (source/destination) under control signals but does not 'hold' data persistently.

Step-by-Step Solution:

Verification / Alternative check:

Microarchitecture diagrams consistently show the ALU with inputs/outputs to register files; control and storage are separate blocks.

Why Other Options Are Wrong:

'True' would conflate transient signal presence in the ALU's datapath with actual storage responsibility.

Common Pitfalls:

Thinking any unit that 'handles' data also 'stores' it; overlooking the central role of registers and cache for temporaries.

Final Answer:

False