Which of the following registers is loaded with the contents of the memory location pointed by the PC?
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Answer: B) Memory data register
The Program Counter (PC) holds the address of the next instruction. That address is transferred to the Memory Address Register (MAR). The contents of that memory location are then fetched into the Memory Data Register (MDR).
Exam Tip:
MAR = Holds the memory address
MDR = Holds the data read from or written to memory
IR = Holds the current instruction
PC = Holds the address of the next instruction
Source: Scan #36 page 12 Q460