When the control unit fetches an instruction from memory, it stores it in the ____.
A) load register
B) instruction register
C) first general-purpose register
D) control register

Question

Quizplus · Accepted Answer

The instruction fetched from memory is stored in the instruction register (IR), which is a special register within the control unit. The IR holds the current instruction being executed, and it is used to decode the instruction and determine which operation needs to be performed. A is incorrect because there is no specific load register in the CPU. C is incorrect because the first general-purpose register is typically used to store data, not instructions. D is incorrect because the control register performs other functions and is not involved in storing individual instructions.

When the Control Unit Fetches an Instruction from Memory, It