Which sequence represents the correct preorder traversal of a binary tree?
Options
- A. Left, Right, Root
- B. Root, Left, Right
- C. Left, Root, Right
- D. More than one of the above
- E. None of the above
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Quiz Practice:
Correct Answer (Detailed Explanation is Below)
B. Root, Left, Right
Detailed Explanation
Preorder traversal visits the root before its subtrees. Its standard order is Root → Left → Right. It is commonly used when a tree needs to be copied or represented in a form where the root should be processed first. For comparison, inorder is Left → Root → Right, while postorder is Left → Right → Root. Memorizing these three patterns is essential for DSA examination questions.