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A-LevelComputer ScienceObject-Oriented Programming (OOP)Oct/Nov 2023Paper 4 Q324 Marks

A computer game is written using object-oriented programming. The game has multiple characters that can move around the screen. The class Character stores data about the characters. Each character has a name, a current X (horizontal) position and a current Y (vertical) position. [Figure X.X] Character Name : STRING stores the name of the character as a string XPosition : INTEGER stores the X position as an integer YPosition : INTEGER stores the Y position as an integer Constructor() initialises Name, XPosition and YPosition to its parameter values GetXPosition() returns the X position GetYPosition() returns the Y position SetXPosition() adds the parameter to the X position validates that the new X position is between 0 and 10000 inclusive SetYPosition() adds the parameter to the Y position validates that the new Y position is between 0 and 10000 inclusive Move() takes a direction as a parameter and calls either SetXPosition or SetYPosition with an integer value

📋 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 Object-Oriented Programming (OOP) in A-Level Computer Science (syllabus code 9618). It is worth 24 marks.

Source

This question appeared in the Cambridge A-Level Computer Science Oct/Nov 2023 examination, Paper 4 Variant 1.

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