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Trees exam tips
Study Trees with curriculum-aligned Exam Tips resources, practice links, and exam-focused support.
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Resource type
Topic
Trees
AqaA LevelComputer ScienceFundamentals of data structures
Exam tips
Watch the word 'at most'
When describing a binary tree, write that each node has at most two children, not exactly two.
At most two allows a node to have zero, one or two children. Saying exactly two gives an incorrect definition.
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