Tree: Depth-First Search - Binary Tree Preorder Traversal
In a binary tree traversal, if you visit the root node first, then traverse the left subtree, and finally traverse the right subtree, which traversal method are you performing?
In a binary tree traversal, if you visit the root node first, then traverse the left subtree, and finally traverse the right subtree, which traversal method are you performing?
easy💻 Programming Q1 of Q15
Step-by-Step Solution
Solution:
Step 1: Understand traversal orders
Preorder traversal visits nodes in the order: root, left subtree, right subtree.Step 2: Compare with given order
The described order matches exactly the preorder traversal pattern.Final Answer:
Option B -> Option BQuick Check:
Root first, then left, then right [OK]
Quick Trick: Root node first means preorder traversal [OK]
Common Mistakes:
MISTAKES- Confusing preorder with inorder which visits left subtree first
- Thinking postorder visits root first
- Assuming level-order is the same as preorder
Trap Explanation:
PITFALL- Inorder traversal visits left subtree before root, so it looks similar but is incorrect.
Interviewer Note:
CONTEXT- Tests understanding of basic binary tree traversal orders.
Master "Binary Tree Preorder Traversal" in Tree: Depth-First Search
Want More Practice?
15+ quiz questions · All difficulty levels · Free
Free Signup - Practice All QuestionsMore Tree: Depth-First Search Quizzes