Accounting University of Cambridge International Examinations General Certificate of Education Advanced Level
UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Advanced Level
COMPUTING Paper 3 Written SPECIMEN MARK SCHEME
9691/03
For Examination from 2011 2 hours
MAXIMUM MARK: 90
This document consists of 5 printed pages and 1 blank page. [Turn over
© UCLES 2008
2 1 -Safety -Testing acceptable parameters in an industrial reaction -The effects of a test that passed safety limits in real life may put lives in danger -Impossibility -Training astronauts to work on the surface of Mars -Such a task is not possible in real life because we have not been to other planets -Time -Testing what will be the outcome of breeding a plant for 100 generations -100 generations will, in reality, take 100 years to test -Isolation from external factors -Growing crystals to study behaviour -Too easy for material to be contaminated in real life (1 per -, max 3 types, max 9) (a) about [9]
2
BOO
Written by Discussed in
SUBJEC
BOOKWRIT writes AUTHOR
Mark points: 1 for a link entity 1 for other three entities 3 for three relationships (1 for a many to many if link is not provided) 2 for pairs of relationship descriptions (b) (i) -A unique identifier of a record -ISBN code of book (ii) -A key other than the primary key used to identify records -Book publisher (iii) -A primary key in one table that is used as a link to another table -SubjectID in book table (Note: Other suitable examples will be credited) 3 (a) -Whole program not written… -so may not compile -Testing needs to be done… -diagnostics will be more complete -Individual segments can be run… -allowing errors to be isolated -Running will be necessary after very minor changes… -continual compilation of whole code is very wasteful/time consuming (1 per -, max 5)
9691/03/SM/11
[7]
[2]
[2]
[2]
[5]
© UCLES 2008
3 (b) -Check on grammar of statements -Error diagnostics are issued -Jump destinations checked for existence -Control constructs checked
COMPUTING Paper 3 Written SPECIMEN MARK SCHEME
9691/03
For Examination from 2011 2 hours
MAXIMUM MARK: 90
This document consists of 5 printed pages and 1 blank page. [Turn over
© UCLES 2008
2 1 -Safety -Testing acceptable parameters in an industrial reaction -The effects of a test that passed safety limits in real life may put lives in danger -Impossibility -Training astronauts to work on the surface of Mars -Such a task is not possible in real life because we have not been to other planets -Time -Testing what will be the outcome of breeding a plant for 100 generations -100 generations will, in reality, take 100 years to test -Isolation from external factors -Growing crystals to study behaviour -Too easy for material to be contaminated in real life (1 per -, max 3 types, max 9) (a) about [9]
2
BOO
Written by Discussed in
SUBJEC
BOOKWRIT writes AUTHOR
Mark points: 1 for a link entity 1 for other three entities 3 for three relationships (1 for a many to many if link is not provided) 2 for pairs of relationship descriptions (b) (i) -A unique identifier of a record -ISBN code of book (ii) -A key other than the primary key used to identify records -Book publisher (iii) -A primary key in one table that is used as a link to another table -SubjectID in book table (Note: Other suitable examples will be credited) 3 (a) -Whole program not written… -so may not compile -Testing needs to be done… -diagnostics will be more complete -Individual segments can be run… -allowing errors to be isolated -Running will be necessary after very minor changes… -continual compilation of whole code is very wasteful/time consuming (1 per -, max 5)
9691/03/SM/11
[7]
[2]
[2]
[2]
[5]
© UCLES 2008
3 (b) -Check on grammar of statements -Error diagnostics are issued -Jump destinations checked for existence -Control constructs checked
Links: the accounts and warehouse LANs while ensuring that confidential accounts details do not become available in the warehouse [2] (v) -Alters signal to a form that is suitable for computer/communication medium -Used to allow manager separate internet connection via a telephone line [2] © UCLES 2008 9691/03/SM/11 6 BLANK PAGE © UCLES 2008 9691/03/SM/11 Ma