Tree: Depth-First Search - Maximum Depth of Binary Tree
Given the following BFS-based code to compute maximum depth of a binary tree, what is the returned depth for this tree?
Tree:
1
/ \
2 3
/ \
4 5
Given the following BFS-based code to compute maximum depth of a binary tree, what is the returned depth for this tree? Tree: 1 / \ 2 3 / \ 4 5
easy🧾 Code Trace Q3 of Q15
Step-by-Step Solution
Solution:
Step 1: Trace BFS levels
Level 1: Node 1; Level 2: Nodes 2,3; Level 3: Nodes 4,5.Step 2: Count levels processed
Three levels processed, so depth = 3.Final Answer:
Option A -> Option AQuick Check:
Depth matches number of levels in BFS traversal [OK]
Quick Trick: Count BFS levels for depth [OK]
Common Mistakes:
MISTAKES- Off-by-one counting levels
- Ignoring last level nodes
- Confusing node count with depth
Trap Explanation:
PITFALL- Candidates often forget to increment depth after processing each level, undercounting depth.
Interviewer Note:
CONTEXT- Tests ability to mentally execute BFS and count tree depth correctly.
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