A Level CS 1.1.1 d) CPU Piplining

What is the primary purpose of using pipelining in a processor?

• To increase the physical size of the processor

• To reduce the number of instructions a processor can execute

• To improve efficiency by overlapping instruction execution

• To simplify the processor design

What does the processor do after fetching the first instruction?

• Decodes and executes the first instruction simultaneously

• Stops all operations

• Executes the first instruction

• Begins to decode the first instruction while fetching the second

What is the ALU responsible for in the context of pipelining?

• Managing the cache

• Performing arithmetic or logic operations

• Fetching instructions

• Decoding instructions

What is a major limitation of pipelining mentioned in the video?

• The need to flush instructions due to branching

• The increased power consumption

• The reduction in processor speed

• The complexity of the processor design

What happens when a branch instruction is executed in a pipelined processor?

• The processor stops all operations

• The processor reduces its power usage

• The processor doubles the number of instructions it can execute

• Subsequent instructions may need to be flushed from the pipeline

How does pipelining improve the performance of a processor?

• By increasing the time it takes to execute each instruction

• By allowing multiple stages of instruction execution to occur simultaneously

• By executing all instructions in a single step

• By reducing the number of instructions a processor can perform

What are the two types of pipelines mentioned in the video?

• Input Pipeline and Output Pipeline

• Data Pipeline and Control Pipeline

• Single Pipeline and Double Pipeline

• Instruction Pipeline and Arithmetic Pipeline

What is the role of the CPU cache in the context of pipelining?

• To hold different parts of instructions across multiple stages

• To store extra data not currently being used

• To fetch instructions from the main memory

• To slow down the processing speed

What effect does branch prediction have on pipelining?

• It decreases the number of pipeline flushes

• It increases the complexity of the processor

• It reduces the overall speed of the processor

• It has no effect on pipelining

How does pipelining affect the heat generation in a processor?

• Increases heat due to more active components

• Decreases heat as it reduces the voltage used

• Does not affect heat generation

• Reduces heat by slowing down the processor