Introduction / Context:
Word size is a foundational idea in digital systems and computer architecture. It indicates how many bits the processor and its instruction set are designed to handle as a single unit during arithmetic, logic, and data transfer operations. Typical values include 8, 16, 32, and 64 bits. This item checks whether you recognize the correct, standards-based definition of “word size.”
Given Data / Assumptions:
- A “word” is the natural operand size of a computing system.
- Processors, registers, and ALUs are built to operate efficiently on that fixed number of bits.
- Peripherals may use larger or smaller chunks, but the architectural word remains the reference.
Concept / Approach:
The concise definition: word size = number of bits in the system’s native binary word. It influences addressable memory range, instruction encoding, data path width, and performance characteristics for integer math. While systems can process larger data via multiple words or SIMD extensions, the architectural “word” is still the baseline measure.
Step-by-Step Solution:
Identify the system’s native register width (e.g., 32-bit general-purpose registers).Match this width to the ALU operation size for add/and/or instructions.Conclude that the word size equals this bit count (e.g., 32 bits).
Verification / Alternative check:
Consult processor documentation; it explicitly states “32-bit” or “64-bit,” which reflects the word size.
Why Other Options Are Wrong:
Incorrect: Conflicts with the industry definition of word size.Applies only to memory words: The term applies to the CPU’s native operand width, not only memory array organization.Depends solely on the data bus width: Data bus width may differ; many 8-bit CPUs had 16-bit address buses and varied data buses.
Common Pitfalls:
Confusing address bus width with word size.Assuming the presence of 64-bit registers always means 64-bit word for every operation; some ISAs mix sizes.
Final Answer:
Correct
Discussion & Comments