Neco 2022 Computer Studies Question 2

Practice essay / theory question 2 from the 2022 Neco Computer Studies examination. This question covers Computer Hardware .

Neco 2022 Computer Studies Essay / Theory
Topic: Computer Hardware
Question 2 NECO • 2022 • COMPUTER_STUDIES • essay

A small office computer system is configured as follows: - CPU: 3.2 GHz quad‑core processor, each core can execute 1.5 × 10⁹ instructions per second. - RAM: 8 GB DDR4, operating at 2400 MHz with a 64‑bit bus. - Storage: 512 GB SSD with a sequential read speed of 550 MB/s. - Power supply: 450 W rated, with an efficiency of 85 % at 50 % load. Answer the questions that follow, showing all reasoning.

Question Parts

( a )
Calculate the theoretical maximum number of instructions the CPU can execute in one second when all four cores operate at full capacity.
( b )
Determine the maximum data transfer rate (in MB/s) that the RAM can sustain, assuming the bus operates at its full clock frequency and transfers one 64‑bit word per clock cycle.
( c )
If a file of size 2 GB is copied from the SSD to RAM, estimate the total time taken (in seconds) ignoring any overheads, and comment on which component (CPU, RAM or SSD) is the bottleneck in this operation.
( d )
The office decides to upgrade the power supply to improve energy efficiency. If a new 500 W unit has an efficiency of 92 % at 50 % load, calculate the reduction in power loss (in watts) compared with the existing supply when the system draws 225 W.

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About This Question

This is Neco 2022 Computer Studies Question 2. It is one of the essay questions from the 2022 Neco Computer Studies examination.

The question covers Computer Hardware .

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