aqa
A-level
COMPUTER
SCIENCE
Paper 1
Monday 10 June 2024 Afternoon Time allowed: 2 hours 30
minutes
Materials
For this paper you must have:
a computer
a printer
appropriate software
the Electronic Answer Document
an electronic version and a hard copy of the Skeleton Program
an electronic version and a hard copy of the Preliminary Material
an electronic version of the Data files puzzle1.txt, puzzle2.txt, puzzle3.txt and puzzle4.txt.
You must not use a calculator.
Instructions
Type the information required on the front of your Electronic Answer Document.
Before the start of the examination make sure your Centre Number, Candidate Name and
Candidate Number are shown clearly in the footer of every page (also at the top of the front
cover) of your Electronic Answer Document.
Enter your answers into the Electronic Answer Document.
Answer all questions.
Save your work at regular intervals.
Information
The marks for questions are shown in brackets.
The maximum mark for this paper is 100.
No extra time is allowed for printing and collating.
The question paper is divided into four sections.
Advice
You are advised to allocate time to each section as follows:
Section A – 40 minutes; Section B – 20 minutes; Section C – 20 minutes; Section D – 70 minutes.
At the end of the examination
Tie together all your printed Electronic Answer Document pages and hand them to the Invigilator.
Warning
It may not be possible to issue a result for this paper if your details are not on every page of your
Electronic Answer Document.
final 7517/1
,final 7517/1
, 2
Section A
You are advised to spend no longer than 40 minutes on this section.
Enter your answers for Section A in your Electronic Answer Document.
You must save this document at regular intervals.
0 1 State three advantages of using subroutines.
For each advantage, you must explain how the advantage is achieved.
[3 marks]
0 2 Circular queues and linear queues are examples of data structures that can be
implemented using a fixed-length array.
0 2 . 1 Explain why, when implemented using a fixed-length array, a circular queue is usually
considered to be a better choice of data structure than a linear queue.
[2 marks]
0 2 . 2 Describe the steps that must be completed to remove (dequeue) an item from a
circular queue that has been implemented using a fixed-length array.
[5 marks]
0 3
0 3 . 1 Describe the Halting problem.
[2 marks]
0 3 . 2 Explain the importance of the Halting problem.
[1 mark]
final
A-level
COMPUTER
SCIENCE
Paper 1
Monday 10 June 2024 Afternoon Time allowed: 2 hours 30
minutes
Materials
For this paper you must have:
a computer
a printer
appropriate software
the Electronic Answer Document
an electronic version and a hard copy of the Skeleton Program
an electronic version and a hard copy of the Preliminary Material
an electronic version of the Data files puzzle1.txt, puzzle2.txt, puzzle3.txt and puzzle4.txt.
You must not use a calculator.
Instructions
Type the information required on the front of your Electronic Answer Document.
Before the start of the examination make sure your Centre Number, Candidate Name and
Candidate Number are shown clearly in the footer of every page (also at the top of the front
cover) of your Electronic Answer Document.
Enter your answers into the Electronic Answer Document.
Answer all questions.
Save your work at regular intervals.
Information
The marks for questions are shown in brackets.
The maximum mark for this paper is 100.
No extra time is allowed for printing and collating.
The question paper is divided into four sections.
Advice
You are advised to allocate time to each section as follows:
Section A – 40 minutes; Section B – 20 minutes; Section C – 20 minutes; Section D – 70 minutes.
At the end of the examination
Tie together all your printed Electronic Answer Document pages and hand them to the Invigilator.
Warning
It may not be possible to issue a result for this paper if your details are not on every page of your
Electronic Answer Document.
final 7517/1
,final 7517/1
, 2
Section A
You are advised to spend no longer than 40 minutes on this section.
Enter your answers for Section A in your Electronic Answer Document.
You must save this document at regular intervals.
0 1 State three advantages of using subroutines.
For each advantage, you must explain how the advantage is achieved.
[3 marks]
0 2 Circular queues and linear queues are examples of data structures that can be
implemented using a fixed-length array.
0 2 . 1 Explain why, when implemented using a fixed-length array, a circular queue is usually
considered to be a better choice of data structure than a linear queue.
[2 marks]
0 2 . 2 Describe the steps that must be completed to remove (dequeue) an item from a
circular queue that has been implemented using a fixed-length array.
[5 marks]
0 3
0 3 . 1 Describe the Halting problem.
[2 marks]
0 3 . 2 Explain the importance of the Halting problem.
[1 mark]
final
