A Frightening Experience
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UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS
for the guidance of teachers
0420 COMPUTER STUDIES
0420/11
Paper 11, maximum raw mark 100
This mark scheme is published as an aid to teachers and candidates, to indicate the requirements of the examination. It shows the basis on which Examiners were instructed to award marks. It does not indicate the details of the discussions that took place at an Examiners’ meeting before marking began, which would have considered the acceptability of alternative answers.
Mark schemes must be read in conjunction with the question papers and the report on the examination. •
CIE will not enter into discussions or correspondence in connection with these mark schemes.
CIE is publishing the mark schemes for the May/June 2010 question papers for most IGCSE, GCE
Advanced Level and Advanced Subsidiary Level syllabuses and some Ordinary Level syllabuses.
om
.c
MARK SCHEME for the May/June 2010 question paper
s er International General Certificate of Secondary Education
Page 2
1
Mark Scheme: Teachers’ version
IGCSE – May/June 2010
Syllabus
0420
Paper
11
(a) video conferencing
Any two points from:
– meeting between 2 or more participants
– using computer networks/Internet
– to transmit audio/video data in real time
– pictures appear in a window on a monitor in real time
– reference to hardware (webcams, speakers, microphones)
– reference to software (communications, compression)
[2]
(b) simulation
Any two points from:
– studying the behaviour of a system
– by using a model/mathematical representation
– results can be predicted
– e.g. flight (or other) simulator, modelling hazardous chemical processes
– e.g. 10-pin bowling computer game
[2]
(c) interrupt
Any two points from:
– a signal/request generated by a device/program
– which causes a break in the execution of a program/stops the program
– e.g. printer out
w ap eP
m
e tr .X
w
UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS
for the guidance of teachers
0420 COMPUTER STUDIES
0420/11
Paper 11, maximum raw mark 100
This mark scheme is published as an aid to teachers and candidates, to indicate the requirements of the examination. It shows the basis on which Examiners were instructed to award marks. It does not indicate the details of the discussions that took place at an Examiners’ meeting before marking began, which would have considered the acceptability of alternative answers.
Mark schemes must be read in conjunction with the question papers and the report on the examination. •
CIE will not enter into discussions or correspondence in connection with these mark schemes.
CIE is publishing the mark schemes for the May/June 2010 question papers for most IGCSE, GCE
Advanced Level and Advanced Subsidiary Level syllabuses and some Ordinary Level syllabuses.
om
.c
MARK SCHEME for the May/June 2010 question paper
s er International General Certificate of Secondary Education
Page 2
1
Mark Scheme: Teachers’ version
IGCSE – May/June 2010
Syllabus
0420
Paper
11
(a) video conferencing
Any two points from:
– meeting between 2 or more participants
– using computer networks/Internet
– to transmit audio/video data in real time
– pictures appear in a window on a monitor in real time
– reference to hardware (webcams, speakers, microphones)
– reference to software (communications, compression)
[2]
(b) simulation
Any two points from:
– studying the behaviour of a system
– by using a model/mathematical representation
– results can be predicted
– e.g. flight (or other) simulator, modelling hazardous chemical processes
– e.g. 10-pin bowling computer game
[2]
(c) interrupt
Any two points from:
– a signal/request generated by a device/program
– which causes a break in the execution of a program/stops the program
– e.g. printer out