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Which of the following problems CANNOT be solved by performing a binary tree inorder traversal?

easy🔍 Pattern Recognition Q2 of Q15
Tree: Depth-First Search - Binary Tree Inorder Traversal
Which of the following problems CANNOT be solved by performing a binary tree inorder traversal?
AFinding the sum of all nodes in a binary tree
BChecking if a binary tree is a valid binary search tree
CFinding the shortest path between two nodes in a binary tree
DReturning nodes in ascending order from a binary search tree
Step-by-Step Solution
Solution:

  1. Step 1: Understand inorder traversal capabilities

    Inorder traversal visits nodes in left-root-right order, useful for BST validation and ordered output.

  2. Step 2: Analyze problem requirements

    Finding shortest path requires graph traversal or BFS, not inorder traversal.

  3. Final Answer:

    Option C -> Option C

  4. Quick Check:

    Shortest path needs BFS/DFS, not inorder traversal [OK]
Quick Trick: Shortest path ≠ inorder traversal [OK]
Common Mistakes:
MISTAKES
  • Assuming inorder traversal can find shortest paths
  • Confusing traversal with pathfinding
Trap Explanation:
PITFALL
  • Candidates often think any tree problem can be solved by inorder traversal, missing pathfinding needs.
Interviewer Note:
CONTEXT
  • Tests ability to distinguish traversal from pathfinding problems
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