Which of the following problems CANNOT be solved using the balanced binary tree pattern (checking subtree height differences)?

easy🔍 Pattern Recognition Q2 of Q15

Tree: Depth-First Search - Balanced Binary Tree

ACheck if a binary tree is height-balanced

BVerify if a binary tree is a valid binary search tree

CFind the maximum depth of a binary tree

DDetermine if the difference in height between left and right subtrees is at most 1 for every node

Step-by-Step Solution

Solution:

Step 1: Analyze each problem's requirements
Checking balance or height uses subtree height info; verifying BST requires ordering constraints.
Step 2: Identify which problem does not fit balanced tree pattern
Valid BST check depends on node values and ordering, not subtree heights.
Final Answer:
Option B -> Option B
Quick Check:
BST validation needs ordering, not height [OK]

Quick Trick: BST validation needs ordering, not height [OK]

Common Mistakes:

MISTAKES

Trap Explanation:

PITFALL

Candidates often think all tree problems use height checks, but BST validation is different.

Interviewer Note:

CONTEXT

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