Computer Science · May / June 2025 · Paper 11 · Question 5
0478
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Data is processed by the central processing unit (CPU) in a computer that has a Von Neumann architecture.
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5(a)[5]
Term
Definition
current instruction register
stores the instruction that is being decoded/executed
(CIR)
This is a processing unit within the CPU that can fetch,
core
decode and execute instructions.
This is a list of all the commands that can be processed by
instruction set
the CPU.
cache
stores frequently used data/instructions
accumulator
stores the result of interim calculations
5(b)[1]
Control unit // CU
5(c)[3]
Three from:
On each clock pulse, an FDE cycle is performed.The clock speed is the number of FDE cycle performed in a second // The clock speed is the number of times the clock pulses per second/per unit of time.If clock speed is increased more FDE cycles can be performed in a second // If clock speed is decreased fewer FDE cycles can be performed in a second.If clock speed is increased, it can improve the performance of the CPU // If clock speed is decreases it decreases the performance of the CPU.
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