AS LEVEL COMPUTER SCIENCE: Actual May 2025 PAST PAPER 2: Algorithms and
problem solving. All Assessment Questions & Mark Scheme [OCR H046/02]
Exam Resource Summary
The AS Level Computer Science May 2025 Paper 2: Algorithms and Problem Solving (OCR
H046/02) – All Assessment Questions & Mark Scheme document integrates the complete
official examination paper with its full mark scheme, providing a structured and detailed revision
resource. This paper assesses students’ understanding of algorithm design, computational
thinking, and problem-solving techniques, covering key topics such as searching and sorting
algorithms, recursion, data structures, and pseudocode implementation. It also evaluates
students’ ability to apply logical reasoning and programming principles to develop efficient
and accurate solutions. The merged format presents each question alongside its marking criteria,
giving students clear insight into examiner expectations, mark allocation, and structured
coding and reasoning approaches. This resource is essential for focused revision, self-
assessment, and strengthening computational and analytical skills, making it a key tool for
preparation for the May 2026 OCR AS Level Computer Science Paper 2: Algorithms and
Problem Solving examination.
Turn over
, 2
1 A gym owner would like a program for members to be able to book gym classes. Each class can
have a maximum of 20 members.
Members will enter their membership ID and then the date and time of the class they want to
attend. Validation rules will check these details meet set rules. If they do not meet the validation
rules then an error message will be displayed. A confirmation message will be displayed if the
class is not full. A bleeping sound will play if the class is full.
(a) Identify two inputs and two outputs for the program.
Input 1 ..............................................................................................................................................
Input 2 ..............................................................................................................................................
Output 1 ...........................................................................................................................................
Output 2 ...........................................................................................................................................
[4]
(b) The programmer is identifying any possible reusable components in the program design.
Explain why the programmer should create reusable program components.
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..........................................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
. ................................................................................................................................................. [3]
© OCR 2025
, 3
BLANK PAGE
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, 4
2 Players in a computer game collect items. Each item has a name, e.g. “Fruit” and a type,
e.g. “Apple”. The items for player 1 are stored in a 2D array. The array is 0-indexed.
The pseudocode declaration for the array is:
array p1Items[10,2]
The first dimension stores the item name and the second dimension stores the type.
(a) One characteristic of the array is that it has 2 dimensions.
Identify two other characteristics of the given array.
1 .......................................................................................................................................................
..........................................................................................................................................................
2 .......................................................................................................................................................
..........................................................................................................................................................
[2]
(b) When the game starts, the pseudocode procedure initialiseArray will initialise each name
and type in the array to "empty".
01 procedure initialiseArray(p1Items:byRef)
02 counter = 0
03 while counter < 10
04 p1Items[counter, 0] = "empty"
05 p1Items[counter, 1] = "empty"
06 counter = counter + 1
07 endwhile
08 endprocedure
(i) State why empty is in speech marks on lines 04 and 05.
..........................................................................................................................................................
. ................................................................................................................................................. [1]
(ii) Rewrite the code in lines 02 to 07 to use a for loop instead of a while loop.
Write your answer using pseudocode or program code.
..........................................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
. ................................................................................................................................................. [2]
© OCR 2025
problem solving. All Assessment Questions & Mark Scheme [OCR H046/02]
Exam Resource Summary
The AS Level Computer Science May 2025 Paper 2: Algorithms and Problem Solving (OCR
H046/02) – All Assessment Questions & Mark Scheme document integrates the complete
official examination paper with its full mark scheme, providing a structured and detailed revision
resource. This paper assesses students’ understanding of algorithm design, computational
thinking, and problem-solving techniques, covering key topics such as searching and sorting
algorithms, recursion, data structures, and pseudocode implementation. It also evaluates
students’ ability to apply logical reasoning and programming principles to develop efficient
and accurate solutions. The merged format presents each question alongside its marking criteria,
giving students clear insight into examiner expectations, mark allocation, and structured
coding and reasoning approaches. This resource is essential for focused revision, self-
assessment, and strengthening computational and analytical skills, making it a key tool for
preparation for the May 2026 OCR AS Level Computer Science Paper 2: Algorithms and
Problem Solving examination.
Turn over
, 2
1 A gym owner would like a program for members to be able to book gym classes. Each class can
have a maximum of 20 members.
Members will enter their membership ID and then the date and time of the class they want to
attend. Validation rules will check these details meet set rules. If they do not meet the validation
rules then an error message will be displayed. A confirmation message will be displayed if the
class is not full. A bleeping sound will play if the class is full.
(a) Identify two inputs and two outputs for the program.
Input 1 ..............................................................................................................................................
Input 2 ..............................................................................................................................................
Output 1 ...........................................................................................................................................
Output 2 ...........................................................................................................................................
[4]
(b) The programmer is identifying any possible reusable components in the program design.
Explain why the programmer should create reusable program components.
..........................................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
. ................................................................................................................................................. [3]
© OCR 2025
, 3
BLANK PAGE
DO NOT WRITE ON THIS PAGE
© OCR 2025 Turn over
, 4
2 Players in a computer game collect items. Each item has a name, e.g. “Fruit” and a type,
e.g. “Apple”. The items for player 1 are stored in a 2D array. The array is 0-indexed.
The pseudocode declaration for the array is:
array p1Items[10,2]
The first dimension stores the item name and the second dimension stores the type.
(a) One characteristic of the array is that it has 2 dimensions.
Identify two other characteristics of the given array.
1 .......................................................................................................................................................
..........................................................................................................................................................
2 .......................................................................................................................................................
..........................................................................................................................................................
[2]
(b) When the game starts, the pseudocode procedure initialiseArray will initialise each name
and type in the array to "empty".
01 procedure initialiseArray(p1Items:byRef)
02 counter = 0
03 while counter < 10
04 p1Items[counter, 0] = "empty"
05 p1Items[counter, 1] = "empty"
06 counter = counter + 1
07 endwhile
08 endprocedure
(i) State why empty is in speech marks on lines 04 and 05.
..........................................................................................................................................................
. ................................................................................................................................................. [1]
(ii) Rewrite the code in lines 02 to 07 to use a for loop instead of a while loop.
Write your answer using pseudocode or program code.
..........................................................................................................................................................
..........................................................................................................................................................
..........................................................................................................................................................
. ................................................................................................................................................. [2]
© OCR 2025
