Exam (elaborations)
A-LEVEL OCR COMPUTER SCIENCE JUNE 2024 PAPER 2 QUESTION PAPER (H44602)
A-LEVEL OCR COMPUTER SCIENCE JUNE 2024 PAPER 2 QUESTION PAPER (H44602)
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Oxford Cambridge and RSATuesday 18 June 2024 – Afternoon
A Level Computer Science
H446/02 Algorithms and programming
Time allowed: 2 hours 30 minutes
You can use:
a ruler (cm/mm)
an HB pencil
Do not use:
a calculator
Please write clearly in black ink. Do not write in the barcodes.
Centre number Candidate number
First name(s)
Last name
INSTRUCTIONS
• Use black ink. You can use an HB pencil, but only for graphs and diagrams.
• Write your answer to each question in the space provided. If you need extra space use
the lined pages at the end of this booklet. The question numbers must be clearly shown.
• Answer all the questions.
INFORMATION
• The total mark for this paper is 140.
• The marks for each question are shown in brackets [ ] .
• Quality of extended response will be assessed in questions marked with an asterisk (*).
• This document has 32 pages.
ADVICE
• Read each question carefully before you start your answer.
© OCR 2024 [601/4911/5]
OCR is an exempt Charity
DC (PQ/CGW) 325009/6
Turn over
, 2
Section A
1 A student has written this pseudocode algorithm:
01 a = 12
02 do
03 b = input("Enter a number")
04 until b >= 0 and b <= 100
05 for c = 1 to a
06 print(c * a)
07 next c
(a) The program uses variables.
(i) Describe what is meant by a variable.
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(ii) Give the identifiers of all the variables used in this program.
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(b) The student has used a do loop on line 02.
Describe the difference between a do loop and a while loop.
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[2]
© OCR 2024
, 3
(c) Rewrite lines 05 to 07 to use a while loop instead of a for loop.
You should write your answer using either program code or pseudocode.
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© OCR 2024 Turn over
, 4
2* A company runs a Virtual Learning Environment (VLE). Schools can register students to use the
VLE. The students get their own account and the school can view and monitor their students who
are registered. There are currently over 10 000 schools registered, each with up to 1000
students.
The students can watch videos, take quizzes and communicate using forums and online chat
tools.
The company gathers a large amount of data and wants to use data mining to help them decide
how to improve the VLE in the future.
Discuss how the company can use data mining to decide how to improve the VLE.
You should include the following in your answer:
• the characteristics of data mining
• the benefits of data mining in this scenario
• the drawbacks of data mining in this scenario.
[12]
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© OCR 2024
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