Exam-style question
Try this first
In a rooted tree, which node is the only node with no parent?.
- A.The leaf
- B.The root
- C.The child
- D.The descendant
Model answer
What a good answer should say
- The root
Explanation
Why this works
The root is the only node in a rooted tree with no parent. All other nodes are descendants of the root.
Common mistake
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