AS
COMPUTER SCIENCE
Paper 2
Materials
For this paper you must have:
• a calculator.
Instructions
• Use black ink or black ball-point pen.
• Fill in the boxes at the top of this page.
• Answer all questions.
Time allowed: 1 hour 30 minutes
• You must answer th...
Candidate signature
I declare this is my own work.
AS
COMPUTER SCIENCE
Paper 2
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 2
pen.
3
Fill in the boxes at the top of this
4
page.
Answer all questions. 5
You must answer the questions in the spaces provided. Do not 6 If you wish to
return to an
7
answer
IB/G/Jun22/
8 previously
E11
write outside the box around each page or on blank pages. 9 crossed out,
If you need extra space for your answer(s), use the lined pages at 10 ring the
the end of this book. Write the question number against your answer you
11
answer(s). now wish to
Do all rough work in this book. Cross through any work you do TOTAL select as
not want to be marked. shown.
Information
The marks for questions are shown in brackets.
The maximum mark for this paper is 75.
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.
,7516/2
, 2
Do not write
outside the
Answer all questions in the spaces box
provided.
0 1 . 1 Describe the difference between natural numbers and integers.
In your answer, give one example of a number that is an integer but not a
natural number.
[2 marks]
0 1 . 2 Describe what it means for a number to be irrational.
In your answer, give one example of an irrational number.
[2 marks]
IB/G/
Jun22/7516/2
, 3
Do not write
outside the
0 1 .3 Shade one lozenge in the Counting column to indicate which set of box
numbers is most suitable for counting and one lozenge in the Measuring
column to indicate which set of numbers is most suitable for measuring
real-world quantities.
[2 marks]
Counting Measuring
A Integer
B Natural
C Rational
6
D Real
0 2 . 1 Convert the decimal number 177 to unsigned binary using 8 bits.
[1 mark]
0 2 . 2 Convert the decimal number 193 to hexadecimal.
[1 mark]
2
Turn over for the next question
IB/G/
Jun22/7516/2
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