What are the common views in Binary Tree traversal questions?
A conceptual question covering Left View, Right View, Top View, Bottom View, etc.
Why Interviewers Ask This
Tests breadth of knowledge regarding tree traversals and level-order processing.
How to Answer This Question
List the types of views. Explain that Level Order Traversal (BFS) is typically used. Mention using a map or queue to track the first/last node at each level.
Key Points to Cover
- Level Order Traversal is key
- Track levels or horizontal distances
- Differentiate between Left/Right and Top/Bottom
- Use Maps or Queues
Sample Answer
Common views include Left View (first node at each level), Right View (last node), Top View (first node encountered in vertical order), and Bottom View (last node in vertical order). These are usually solved using BFS or…
Common Mistakes to Avoid
- Confusing Left View with Preorder
- Ignoring vertical distance for Top/Bottom
- Not handling empty trees
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