O LevelComputer ScienceCambridge (CIE)Revision Notes

Cambridge (CIE) O Level Computer Science
Revision Notes

Exam code: 2210

Concise resources for the Cambridge (CIE) O Level Computer Science course.

1. Data Representation

Computers & Binary

Converting Between Binary & Denary

Converting Between Hexadecimal & Denary

Converting Between Hexadecimal & Binary

Uses of Hexadecimal

Binary Addition

Two's Complement

Representing Sound

Representing Images

Units of Data Storage

Calculating File Sizes

2. Data Transmission

Packet Switching

Data Transmission

Universal Serial Bus (USB)

Error Detection Methods

Automatic Repeat Query (ARQ)

3. Hardware

The CPU & Microprocessors

Von Neumann Architecture

The Fetch-Decode-Execute Cycle

Characteristics of the CPU

CPU Instruction Sets

Embedded Systems

Primary Storage

Secondary Storage

Network Interface Card (NIC)

MAC Addresses & IP Addresses

4. Software

System Software & Application Software

The Purpose & Functionality of Operating Systems

Hardware, Firmware & the Operating System

Levels of Programming Languages

Assembly Language

Translators, Compilers & Interpreters

Tools & Facilities in IDEs

5. The Internet & its Uses

The Internet & the World Wide Web

Network Protocols

Digital Currency

Cyber Security Threats

Keeping Data Safe

6. Automated & Emerging Technologies

Automated Systems

Artificial Intelligence (AI)

7. Algorithm Design & Problem-Solving

Program Development Life Cycle

Computer Sub-Systems

Problem Decomposition

Designing Algorithms

Explaining Algorithms

Linear Search & Bubble Sort

Other Standard Methods of a Solution

Validation & Verification

Suitable Test Data

Identifying Errors

Writing & Amending Algorithms

8. Programming

Variables & Constants

Totalling & Counting

String Handling

Arithmetic, Logical & Boolean Operators

Procedures & Functions

Local & Global Variables

Library Routines

Maintaining Programs

9. Databases

Single Table Databases

10. Boolean Logic

Logic Expressions

Study tools

Related links