In a computer system, what does the term "word size" refer to?

Solution (By Examveda Team)

Option C: Number of bits processed at once by the CPU
In computer architecture, the term "word size" refers to the number of bits that the CPU processes in a single operation or the width of its internal registers. This size determines the amount of data that can be transferred internally between the CPU and RAM, and the size of instructions that the CPU can execute.

Option A: Size of the hard disk
The size of the hard disk refers to its storage capacity in terms of bytes, typically gigabytes or terabytes, not bits.

Option B: Length of the RAM module
The length of a RAM module usually refers to its physical size or the amount of data it can store, measured in gigabytes (GB) or megabytes (MB), rather than bits.

Option D: Number of processors
The term "word size" does not relate to the number of processors in a computer system but rather to the data processing capabilities of a single processor.

Conclusion:
The correct answer, Option C: Number of bits processed at once by the CPU, accurately defines what "word size" signifies in the context of computer architecture, focusing on the CPU's ability to handle data in specific bit sizes during operations.