Module B · Computer System Fundamentals
Curriculum hours: 20 · Examined in: Paper 1 · Heavy MC source.
This module gives you the mental model of how the major hardware and system-software components of a computer work together.
Chapter map
| Chapter | Sub-topics | Hours |
|---|---|---|
| 1 · Basic Machine Organisation | CPU, fetch–decode–execute, memory, storage, I/O | 14 |
| 2 · System Software | OS, utilities & drivers, modes of operation | 6 |
What you will be able to do
- Describe the function of every major hardware unit (CPU, memory, storage, I/O).
- Walk through the fetch–decode–execute cycle and the role of buses and registers.
- Compare RAM, ROM and cache; volatile vs non-volatile storage.
- Select an appropriate device for a given context (cost, capacity, speed, mobility).
- Distinguish system software and applications software; explain OS, utilities, drivers.
- Describe batch, real-time, parallel, distributed and virtualisation modes of operation.
Why this module is high-yield
Hardware facts change slowly, so Paper 1 reuses the same kinds of MC and short-answer questions across years. With a few hours of study you can lock in 8–12 marks reliably.
Study tips
- Use flashcards for device specs and unit prefixes (KB/MB/GB/TB; ms/μs/ns/ps).
- Watch a 5-minute fetch–decode–execute animation on YouTube once a week.
- For each utility / mode, write a one-sentence example rather than memorising definitions verbatim.
➡️ Start: Chapter 1 · Basic Machine Organisation