A-LevelComputer ScienceData Structures and ProgrammingMay/June 2025Paper 3 Q47 Marks
A linked list of nodes is used to store an ordered list of integers. Each node consists of the data, a left pointer and a right pointer, for example: Left pointer Data Right pointer [Figure showing a node with '20' in the data box and empty pointer boxes] The linked list will be organised as a binary tree. -1 is used to represent a null pointer.
📋 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.
🔒
Unlock the Examiner's Analysis
Sign up for free to reveal the full examiner report, trap analysis, and mark scheme breakdown for this question.
Sign Up Free to Unlock →Join thousands of Cambridge students already using Oracle Prep