Computer Science · May / June 2025 · Paper 12 · Question 4
0478
As printed in the paper
The question as text
An employee uses a computer that has a Von Neumann architecture to complete many different tasks in their working day.
Read automatically from the paper; the printed page above is exact.
Show the answer and mark scheme
4(a)[6]
One mark for each correct component or description
Component
Description
It sends signals to all the components in the CPU to
Control unit // CU
manage the flow of data through the CPU.
Arithmetic and logic unit // ALU It carries out all the arithmetic and logic operations
in the CPU.
Cache
It stores frequently used data/instructions
It stores the address of the next instruction to be
Program counter (PC)
fetched
It controls the number of fetch-decode-execute
Clock
(FDE) cycles that are performed per second.
It stores data immediately before it is transmitted to
Memory data register // MDR
RAM and immediately after it is received from RAM.
4(b)[2]
Two from:
An embedded system is designed to perform a dedicated/limited/single function // computer can be used to perform many different functions.An embedded system has dedicated hardware // computer has hardware that can be used by other devices.An embedded system has software that is not easily updated/reprogrammed // software can easily beupdated/reprogrammed on the computer.
An embedded system has a microprocessor // A computer has a CPU.An embedded system can be part of/built into a larger device // A computer is normally standalone
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