My Revision Notes · WJEC and Eduqas GCSE Computer Science by Wicks, Robert -- Read -- Imperial Library of Trantor

Index

Cover Title Page Copyright Get the most from this book My revision planner Introduction

Using this book How to revise Examination technique Finally…

Unit 1

1 Hardware

The Von Neumann model Central processing unit The fetch-decode-execute cycle Factors affecting processor performance Input and output Data capacity and storage requirements

2 Logical Operations

Logical operators Truth tables Boolean logic Simplifying Boolean expressions using Boolean identities and rules

3 Communication

Networks Servers Wired and wireless networks Network hardware Protocols Layers Routing IP addresses

4 Organisation and structure of data

Representation of numbers Arithmetic shift functions Overflow Adding binary numbers Representation of graphics and sound Metadata Storage of characters Data types Data structures Data validation and verification Algorithms

5 System Software

The operating system Utility software

6 Principles of programming

Computer languages

7 Software engineering 8 Program construction

Assembler Compiler Interpreter The process of compilation Programming errors

9 Security and data management

Data Security Data management Compression Network security Policies Cybersecurity Protecting software during production Internet cookies

10 Ethical, legal and environmental impacts

Computer crime E-commerce Social Impact of digital technology Standards Legislation Environmental issues

Worked examples

Unit 2

1 Problem solving

Decomposition Abstraction

2 Algorithms and programming constructs

Algorithms Flowcharts Pseudocode Programming constructs Sequence, selection, repetition Counting Object-orientated programs Input, processing and output Variables Identifiers String handling Mathematical operations Logical operations Sorting Searching Testing and evaluation

3 Programming languages

Hypertext Markup Language (HTML) Assembly language Object-oriented programming

4 Data structures and data types

Variables and constants

5 Security and authentication

Security techniques Validation algorithms

Glossary of programming terms