A-LevelComputer ScienceObject-Oriented Programming (OOP)May/June 2025Paper 4 Q329 Marks
A program stores data in a linked list that is designed using Object-Oriented Programming (OOP). The class Node stores data about the nodes. Node TheData : Integer stores the integer data NextNode : Node stores the next node in the linked list Constructor() initialises TheData to its parameter value, initialises NextNode to a null value GetData() returns TheData GetNextNode() returns NextNode SetNextNode() takes an object of type Node as a parameter and stores it in NextNode The class LinkedList stores the linked list. LinkedList HeadNode : Node stores the first node in the linked list Constructor() initialises HeadNode to a null value InsertNode() creates a new node using its integer parameter. Sets this node as the new head node and updates NextNode RemoveNode() finds the first node that contains its integer parameter and removes this node from the linked list Traverse() concatenates and returns the integer data in each node in the linked list
📋 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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