AS
Computer Science
Paper 2 (7516/2)
Mark scheme
7516
June 2017
Version: 1.0 Final
,Mark schemes are prepared by the Lead Assessment Writer and considered, together with the
relevant questions, by a panel of subject teachers. This mark scheme includes any amendments
made at the standardisation events which all associates participate in and is the scheme which was
used by them in this examination. The standardisation process ensures that the mark scheme covers
the students’ responses to questions and that every associate understands and applies it in the same
correct way. As preparation for standardisation each associate analyses a number of students’
scripts. Alternative answers not already covered by the mark scheme are discussed and legislated
for. If, after the standardisation process, associates encounter unusual answers which have not been
raised they are required to refer these to the Lead Assessment Writer.
It must be stressed that a mark scheme is a working document, in many cases further developed and
expanded on the basis of students’ reactions to a particular paper. Assumptions about future mark
schemes on the basis of one year’s document should be avoided; whilst the guiding principles of
assessment remain constant, details will change, depending on the content of a particular
examination paper.
Further copies of this mark scheme are available from aqa.org.uk
Copyright © 2017 AQA and its licensors. All rights reserved.
AQA retains the copyright on all its publications. However, registered schools/colleges for AQA are permitted to copy material from this
booklet for their own internal use, with the following important exception: AQA cannot give permission to schools/colleges to photocopy any
material that is acknowledged to a third party even for internal use within the centre.
, MARK SCHEME – AS COMPUTER SCIENCE PAPER 2 – 7516/2 – JUNE 2017
AS Computer Science
Paper 2 (7516/2)
June 2016
To Examiners:
When to award ‘0’ (zero) or ‘–’ (hyphen) when inputting marks on CMI+
A mark of 0 should be awarded where a candidate has attempted a question but failed to
write anything creditworthy.
Insert a hyphen when a candidate has not attempted a question, so that eventually the
Principal Examiner will be able to distinguish between the two (not attempted / nothing
creditworthy) in any statistics.
This mark scheme contains the correct responses which we believe that candidates are
most likely to give. Other valid responses are possible to some questions and should be
credited. Examiners should refer responses that are not covered by the mark scheme, but
which they deem creditworthy, to a Team Leader.
The following annotation is used in the mark scheme:
; - means a single mark
// - means alternative response
/ - means an alternative word or sub-phrase
A - means acceptable creditworthy answer
R - means reject answer as not creditworthy
NE - means not enough
I - means ignore
DPT - means "Don't penalise twice". In some questions a specific error made by a candidate, if
repeated, could result in the loss of more than one mark. The DPT label indicates that
this mistake should only result in a candidate losing one mark, on the first occasion that
the error is made. Provided that the answer remains understandable, subsequent marks
should be awarded as if the error was not being repeated.
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Computer Science
Paper 2 (7516/2)
Mark scheme
7516
June 2017
Version: 1.0 Final
,Mark schemes are prepared by the Lead Assessment Writer and considered, together with the
relevant questions, by a panel of subject teachers. This mark scheme includes any amendments
made at the standardisation events which all associates participate in and is the scheme which was
used by them in this examination. The standardisation process ensures that the mark scheme covers
the students’ responses to questions and that every associate understands and applies it in the same
correct way. As preparation for standardisation each associate analyses a number of students’
scripts. Alternative answers not already covered by the mark scheme are discussed and legislated
for. If, after the standardisation process, associates encounter unusual answers which have not been
raised they are required to refer these to the Lead Assessment Writer.
It must be stressed that a mark scheme is a working document, in many cases further developed and
expanded on the basis of students’ reactions to a particular paper. Assumptions about future mark
schemes on the basis of one year’s document should be avoided; whilst the guiding principles of
assessment remain constant, details will change, depending on the content of a particular
examination paper.
Further copies of this mark scheme are available from aqa.org.uk
Copyright © 2017 AQA and its licensors. All rights reserved.
AQA retains the copyright on all its publications. However, registered schools/colleges for AQA are permitted to copy material from this
booklet for their own internal use, with the following important exception: AQA cannot give permission to schools/colleges to photocopy any
material that is acknowledged to a third party even for internal use within the centre.
, MARK SCHEME – AS COMPUTER SCIENCE PAPER 2 – 7516/2 – JUNE 2017
AS Computer Science
Paper 2 (7516/2)
June 2016
To Examiners:
When to award ‘0’ (zero) or ‘–’ (hyphen) when inputting marks on CMI+
A mark of 0 should be awarded where a candidate has attempted a question but failed to
write anything creditworthy.
Insert a hyphen when a candidate has not attempted a question, so that eventually the
Principal Examiner will be able to distinguish between the two (not attempted / nothing
creditworthy) in any statistics.
This mark scheme contains the correct responses which we believe that candidates are
most likely to give. Other valid responses are possible to some questions and should be
credited. Examiners should refer responses that are not covered by the mark scheme, but
which they deem creditworthy, to a Team Leader.
The following annotation is used in the mark scheme:
; - means a single mark
// - means alternative response
/ - means an alternative word or sub-phrase
A - means acceptable creditworthy answer
R - means reject answer as not creditworthy
NE - means not enough
I - means ignore
DPT - means "Don't penalise twice". In some questions a specific error made by a candidate, if
repeated, could result in the loss of more than one mark. The DPT label indicates that
this mistake should only result in a candidate losing one mark, on the first occasion that
the error is made. Provided that the answer remains understandable, subsequent marks
should be awarded as if the error was not being repeated.
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