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What is the result of a level-order traversal on a binary tree with root 1, left

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Question: What is the result of a level-order traversal on a binary tree with root 1, left child 2, and right child 3?

Options:

  1. 1, 2, 3
  2. 2, 1, 3
  3. 1, 3, 2
  4. 3, 2, 1

Correct Answer: 1, 2, 3

Solution: 

In level-order traversal, we visit nodes level by level from top to bottom, resulting in the sequence 1, 2, 3.

What is the result of a level-order traversal on a binary tree with root 1, left

Practice Questions

Q1
What is the result of a level-order traversal on a binary tree with root 1, left child 2, and right child 3?
  1. 1, 2, 3
  2. 2, 1, 3
  3. 1, 3, 2
  4. 3, 2, 1

Questions & Step-by-Step Solutions

What is the result of a level-order traversal on a binary tree with root 1, left child 2, and right child 3?
  • Step 1: Start at the root of the binary tree, which is node 1.
  • Step 2: Visit node 1 and record its value.
  • Step 3: Move to the next level and visit the left child of node 1, which is node 2.
  • Step 4: Visit node 2 and record its value.
  • Step 5: Move to the next node at the same level, which is the right child of node 1, node 3.
  • Step 6: Visit node 3 and record its value.
  • Step 7: All nodes have been visited, so the level-order traversal is complete.
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