Cambridge IGCSE Computer Science

Cambridge University Press

978-1-107-69634-1 ¨C Cambridge IGCSE? Computer Science Revision Guide

David Watson, Helen Williams

Frontmatter

More information

Cambridge IGCSE?

Computer

Science

Revision Guide

David Watson and Helen Williams

? in this web service Cambridge University Press



Cambridge University Press

978-1-107-69634-1 ¨C Cambridge IGCSE? Computer Science Revision Guide

David Watson, Helen Williams

Frontmatter

More information

University Printing House, Cambridge CB2 8BS, United Kingdom

Cambridge University Press is part of the University of Cambridge.

It furthers the University¡¯s mission by disseminating knowledge in the pursuit of

education, learning and research at the highest international levels of excellence.



Information on this title: education.

? Cambridge University Press 2015

This publication is in copyright. Subject to statutory exception

and to the provisions of relevant collective licensing agreements,

no reproduction of any part may take place without the written

permission of Cambridge University Press.

First published 2015

Printed in Poland by Opolgraf

A catalogue record for this publication is available from the British Library

ISBN 978-1-107-69634-1 Paperback

Cambridge University Press has no responsibility for the persistence or accuracy

of URLs for external or third-party Internet websites referred to in this publication,

and does not guarantee that any content on such websites is, or will remain,

accurate or appropriate. Information regarding prices, travel timetables, and other

factual information given in this work is correct at the time of first printing but

Cambridge University Press does not guarantee the accuracy of such information

thereafter.

¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­...........................................¡­¡­¡­

NOTICE TO TEACHERS IN THE UK

It is illegal to reproduce any part of this work in material form (including

photocopying and electronic storage) except under the following circumstances:

(i) where you are abiding by a licence granted to your school or institution by the

Copyright Licensing Agency;

(ii) where no such licence exists, or where you wish to exceed the terms of a licence,

and you have gained the written permission of Cambridge University Press;

(iii) where you are allowed to reproduce without permission under the provisions

of Chapter 3 of the Copyright, Designs and Patents Act 1988, which covers, for

example, the reproduction of short passages within certain types of educational

anthology and reproduction for the purposes of setting examination questions.

¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­¡­...........................................¡­¡­¡­

Example answers and all other end-of-chapter questions were written by the authors

? IGCSE is the registered trademark of Cambridge International Examinations.

? in this web service Cambridge University Press



Cambridge University Press

978-1-107-69634-1 ¨C Cambridge IGCSE? Computer Science Revision Guide

David Watson, Helen Williams

Frontmatter

More information

Contents

Introduction

vi

Chapter 1 Introduction to Computer Science

1

1.1

1.2

1

2

An overview of chapters 2 to 12

Components of a typical computer system

Chapter 2 Computer applications

2.1

2.2

2.3

2.4

2.5

Computer interfaces

Communication systems

Monitoring and control of processes

Robotics

End of chapter questions

Chapter 3 The Internet

3.1

3.2

3.3

3.4

3.5

5

5

6

11

16

17

19

The Internet

Broadband and dial up

Recent developments

Intranets

End of chapter questions

19

22

23

29

30

Chapter 4 Security aspects

32

4.1

4.2

4.3

4.4

4.5

4.6

4.7

4.8

4.9

Security and data integrity

Other ways data can be lost or corrupted

Spam and cookies

Firewalls and proxy servers

Secure sockets layer (SSL)

Transport layer security (TLS)

Encryption

Online safeguards

End of chapter questions

Chapter 5 Programming languages and programming

5.1

5.2

High and low level programming languages

Turtle graphics

? in this web service Cambridge University Press

32

35

36

36

38

39

39

41

43

45

45

48



Cambridge University Press

978-1-107-69634-1 ¨C Cambridge IGCSE? Computer Science Revision Guide

David Watson, Helen Williams

Frontmatter

More information

Cambridge IGCSE Computer Science Revision Guide

5.3

5.4

5.5

5.6

Programming concepts

Data structures arrays

Databases

End of chapter questions

Chapter 6 Flowcharts

6.1

6.2

6.3

6.4

6.5

Structure diagrams, top down design, menus,

library routines and subroutines

Common flowchart symbols

Problem solving using flowcharts

Dry running of flowcharts (trace tables)

End of chapter questions

Chapter 7 Pseudocode

7.1

7.2

7.3

Pseudocode

Solving problems using pseudocode

End of chapter questions

50

53

55

58

64

64

67

68

73

78

85

85

87

90

Chapter 8 Logic gates

93

8.1

8.2

8.3

8.4

Logic gates

Truth tables

Logic circuits/networks

End of chapter questions

93

94

96

101

Chapter 9 Computer ethics

105

9.1

9.2

9.3

Computer ethics

Free software, freeware and shareware

End of chapter questions

Chapter 10 Data systems

10.1

10.2

10.3

10.4

10.5

10.6

Data capture techniques

Validation techniques

Verification techniques

Binary systems

Hexadecimal systems

End of chapter questions

Chapter 11 Hardware

11.1

11.2

11.3

11.4

11.5

Features of laptop and desktop computers

Household appliances

Input and output devices

Memory, storage devices and media

End of chapter questions

105

106

107

108

108

110

113

115

118

122

127

127

128

130

145

151

iv

? in this web service Cambridge University Press



Cambridge University Press

978-1-107-69634-1 ¨C Cambridge IGCSE? Computer Science Revision Guide

David Watson, Helen Williams

Frontmatter

More information

Contents

Chapter 12 Operating systems

12.1

12.2

12.3

12.4

12.5

12.6

12.7

12.8

12.9

Operating systems

Interrupts

Batch processing

Real time transaction processing

Real time process control

Computer architecture

Fetch¨Cexecute cycle

Data transmission

End of chapter questions

Chapter 13 Practice papers

13.1 Practice paper 1

13.2 Practice paper 2

154

154

155

156

157

158

158

161

162

166

168

168

175

Answers to questions

183

Index

207

v

? in this web service Cambridge University Press



 ................
................

In order to avoid copyright disputes, this page is only a partial summary.

Google Online Preview   Download