aqa
Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
AS
COMPUTER SCIENCE
Paper 2
Tuesday 21 May 2024 Afternoon Time allowed: 1 hour 30 minutes
Materials
For this paper you must have: For Examiner’s Use
a calculator.
Question Mark
Instructions 1
Use black ink or black ball-point pen. 2
Fill in the boxes at the top of this page. 3
Answer all questions.
4
You must answer the questions in the spaces provided. Do not write outside
the box around each page or on blank pages. 5
If you need extra space for your answer(s), use the lined pages at the end of 6
this book. Write the question number against your answer(s). 7
Do all rough work in this book. Cross through any work you do not want to
8
be marked.
9
Information 10
The marks for questions are shown in brackets. 11
The maximum mark for this paper is 75.
TOTAL
Advice
In some questions you are required to indicate your answer by completely
shading a lozenge alongside the appropriate answer as shown.
If you want to change your answer you must cross out your original answer as
shown.
If you wish to return to an answer previously crossed out, ring the answer you
now wish to select as shown.
7516/2
, 2
Do not write
outside the
Answer all questions in the spaces provided. box
0 1 . 1 Describe the set of real numbers.
[1 mark]
15
0 1 .2 The number 5 can be written as
3
Shade two lozenges to indicate which of the following statements are true.
[2 marks]
A 15 and 3 are not integers
B 15 and 3 are irrational numbers
C 5 is an irrational number
D 5 is a natural number
E 5 is a rational number
0 1 .3 Shade one lozenge to indicate which of the symbols below represents the set of
rational numbers.
[1 mark]
A ℂ
B ℕ
C ℚ
D ℝ
4
E ℤ
final
, 3
Do not write
outside the
0 2 . 1 Convert the bit pattern 10001010 to hexadecimal. box
[1 mark]
0 2 . 2 Represent the decimal number 139 as an 8-bit unsigned binary integer.
[1 mark]
0 2 . 3 Show how the unsigned binary number 00100011 can be added to the unsigned
binary number 00101011 without converting the numbers into decimal.
You must show all your working in binary.
[2 marks]
0 0 1 0 0 0 1 1
+ 0 0 1 0 1 0 1 1
Question 2 continues on the next page
Turn over ►
final
, 4
Do not write
outside the
box
final
Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
AS
COMPUTER SCIENCE
Paper 2
Tuesday 21 May 2024 Afternoon Time allowed: 1 hour 30 minutes
Materials
For this paper you must have: For Examiner’s Use
a calculator.
Question Mark
Instructions 1
Use black ink or black ball-point pen. 2
Fill in the boxes at the top of this page. 3
Answer all questions.
4
You must answer the questions in the spaces provided. Do not write outside
the box around each page or on blank pages. 5
If you need extra space for your answer(s), use the lined pages at the end of 6
this book. Write the question number against your answer(s). 7
Do all rough work in this book. Cross through any work you do not want to
8
be marked.
9
Information 10
The marks for questions are shown in brackets. 11
The maximum mark for this paper is 75.
TOTAL
Advice
In some questions you are required to indicate your answer by completely
shading a lozenge alongside the appropriate answer as shown.
If you want to change your answer you must cross out your original answer as
shown.
If you wish to return to an answer previously crossed out, ring the answer you
now wish to select as shown.
7516/2
, 2
Do not write
outside the
Answer all questions in the spaces provided. box
0 1 . 1 Describe the set of real numbers.
[1 mark]
15
0 1 .2 The number 5 can be written as
3
Shade two lozenges to indicate which of the following statements are true.
[2 marks]
A 15 and 3 are not integers
B 15 and 3 are irrational numbers
C 5 is an irrational number
D 5 is a natural number
E 5 is a rational number
0 1 .3 Shade one lozenge to indicate which of the symbols below represents the set of
rational numbers.
[1 mark]
A ℂ
B ℕ
C ℚ
D ℝ
4
E ℤ
final
, 3
Do not write
outside the
0 2 . 1 Convert the bit pattern 10001010 to hexadecimal. box
[1 mark]
0 2 . 2 Represent the decimal number 139 as an 8-bit unsigned binary integer.
[1 mark]
0 2 . 3 Show how the unsigned binary number 00100011 can be added to the unsigned
binary number 00101011 without converting the numbers into decimal.
You must show all your working in binary.
[2 marks]
0 0 1 0 0 0 1 1
+ 0 0 1 0 1 0 1 1
Question 2 continues on the next page
Turn over ►
final
, 4
Do not write
outside the
box
final
