This section contains carefully selected MCQs and Previous Year Questions with explanations to help students understand concepts and prepare effectively for examinations, interviews, and competitive tests.
Q: 1A processor performing fetch or decoding of different instruction during the execution of another instruction is called ___________.
Option B
Pipelining is a technique in which a processor overlaps multiple stages of instruction execution. While one instruction is being executed, another instruction can be fetched and a third one can be decoded at the same time.
This means different stages like Fetch → Decode → Execute are performed simultaneously for different instructions, increasing CPU efficiency.
Q: 2The instruction fetch phase ends with _______________.
Option D
The instruction fetch phase is the first step of the instruction cycle in a CPU. During this phase, the instruction is fetched from memory and prepared for execution.
During the instruction fetch phase, the address from the Program Counter (PC) is first transferred to the MAR, then the instruction is fetched from memory into the MDR, and finally it is transferred to the IR and decoded.
The fetch phase ends when the instruction is placed in the IR and decoded, making it ready for execution.
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