2025 OCR AS LEVEL COMPUTER SCIENCE H046/02 Algorithms and Problem Solving Question Paper &
Mark Scheme (Merged) May 2025 [VERIFIED]
© OCR 2025 OCR is an exempt
[601/5030/0] DC Charity Turn over
(KS) 324952/8
, 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
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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 .......................................................................................................................................................
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[2]
(b) When the game starts, the pseudocode procedure initialiseArraywill 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 emptyis in speech marks on lines 04and 05.
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. ....................................................................................................................................................... [1]
(ii) Rewrite the code in lines 02to 07to use a for loop instead of a while loop.
Write your answer using pseudocode or program code.
..........................................................................................................................................................
© OCR 2025
Mark Scheme (Merged) May 2025 [VERIFIED]
© OCR 2025 OCR is an exempt
[601/5030/0] DC Charity Turn over
(KS) 324952/8
, 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 initialiseArraywill 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 emptyis in speech marks on lines 04and 05.
..........................................................................................................................................................
. ....................................................................................................................................................... [1]
(ii) Rewrite the code in lines 02to 07to use a for loop instead of a while loop.
Write your answer using pseudocode or program code.
..........................................................................................................................................................
© OCR 2025
