In a processor, while executing an instruction a. Programme Counter is used to hold the addres

Question

In a processor, while executing an instruction \( \qquad \)
a. Programme Counter is used to hold the address of next instruction.
b. Instruction register holds the instruction for execution.
c. Memory Address Register is used to perform address translation.
d. Memory Data Register is used to perform data operation.
e. Clock generates control signals.
Choose the correct answer form the options given below.

Accepted Answer

(a) True: the Program Counter holds the address of the next instruction.
(b) True: the Instruction Register holds the instruction being executed.
(c) False: the MAR only holds the address of the memory location to be accessed. Address translation is done by the MMU.
(d) False: the MDR only holds data being read from or written to memory. Operations on data are done by the ALU.
(e) False: the clock gives timing pulses. Control signals are generated by the control unit.

So only A and B are true.

Answer: (A)

Question 79

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