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What is the result of a postorder traversal on the binary tree with root 1, left

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

Options:

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

Correct Answer: 2, 3, 1

Solution: 

Postorder traversal visits the left child, then the right child, and finally the root, resulting in the order 2, 3, 1.

What is the result of a postorder traversal on the binary tree with root 1, left

Practice Questions

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

Questions & Step-by-Step Solutions

What is the result of a postorder traversal on the binary tree with root 1, left child 2, and right child 3?
  • Step 1: Identify the root of the binary tree, which is 1.
  • Step 2: Identify the left child of the root, which is 2.
  • Step 3: Identify the right child of the root, which is 3.
  • Step 4: In postorder traversal, first visit the left child (2).
  • Step 5: Next, visit the right child (3).
  • Step 6: Finally, visit the root (1).
  • Step 7: Combine the visited nodes in the order they were visited: 2, 3, 1.
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