COMPUTER SCIENCE AND ENGINEERING
COMPUTER ARCHITECTURE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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PC contains the address of the next instruction.
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The contents of PC is copied to MDR.
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The address of PC is incremented to 1 to fetch the next instruction.
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None of the above
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Detailed explanation-1: -The correct answer is Fetch instruction, Decode instruction, Read operands, Execute instruction and Store data. Steps in the instruction cycle: First of all, the opcode is fetched by the microprocessor from a stored memory location.
Detailed explanation-2: -The control unit fetches (gets) the instruction from memory. The control unit decodes the instruction (decides what it means) and directs that the necessary data be moved from memory to the arithmetic/logic unit.
Detailed explanation-3: -The correct answer is Memory. Memory is not a part of the instruction cycle.
Detailed explanation-4: -Explanation: The fetch execution cycle refers to the execution of instructions by the CPU. This is a multi-step process in which instructions are fetched, decoded, executed, and then stored. The result of this cycle allows an instruction to be executed by the CPU allowing the process cycle to continue.