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A-LevelComputer ScienceModular ProgrammingMay/June 2025Paper 2 Q718 Marks

A program is being developed to implement a customer loyalty scheme for a coffee shop. The programmer has decided that the following data items need to be stored for each customer: | Data item | Description | |:------------|:--------------------------------------------------------------------------| | customer ID | a unique six-digit string | | points | an integer value that is increased by one for every cup of coffee the customer orders | When a customer visits the shop and orders coffee, the scheme operates as follows: • The total number of points is increased by the number of coffees ordered. • If just one cup of coffee is ordered and the number of points goes above 10, then: ○ the cup of coffee they have just ordered is given to them free of charge ○ the number of points is reduced by 11. • If the order is for multiple coffees and the number of points goes above 10, then: ○ they get one coffee free of charge for every 11 points ○ the number of points is reduced by 11 for each free coffee. For example, the: • customer currently has 9 points • customer orders 16 cups of coffee • total number of points now becomes 25 • customer gets 2 free coffees and now has 3 points left. The programmer has defined a program module that is called every time a customer places an order: | Module | Description | |:---------------|:-----------------------------------------------------------------| | CustomerOrder()| • called with two integer parameters: ○ the number of coffees ordered ○ the current number of points • output a suitable message giving the number of free coffees • return a value for the new points total.

📋 Examiner Report & Trap Analysis

Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...

🎯 Mark Scheme Breakdown

Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.

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About This A-Level Computer Science Question

Topic

This structured question tests Modular Programming in A-Level Computer Science (syllabus code 9618). It is worth 18 marks.

Source

This question appeared in the Cambridge A-Level Computer Science May/June 2025 examination, Paper 2 Variant 1.

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