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What is the post-order traversal of a binary tree with nodes 1, 2, and 3 where 1

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Question: What is the post-order traversal of a binary tree with nodes 1, 2, and 3 where 1 is the root, 2 is the left child, and 3 is the right child?

Options:

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

Correct Answer: 2, 3, 1

Solution: 

In post-order traversal, the left child is visited first, then the right child, and finally the root, resulting in 2, 3, 1.

What is the post-order traversal of a binary tree with nodes 1, 2, and 3 where 1

Practice Questions

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

Questions & Step-by-Step Solutions

What is the post-order traversal of a binary tree with nodes 1, 2, and 3 where 1 is the root, 2 is the left child, and 3 is the right child?
  • Step 1: Identify the structure of the binary tree. The tree has a root node (1), a left child (2), and a right child (3).
  • Step 2: Understand post-order traversal. In post-order, we visit the left child first, then the right child, and finally the root node.
  • Step 3: Start with the left child. The left child is 2. Visit node 2.
  • Step 4: Next, visit the right child. The right child is 3. Visit node 3.
  • Step 5: Finally, visit the root node. The root node is 1. Visit node 1.
  • Step 6: Combine the visited nodes in the order they were visited: 2 (left), 3 (right), 1 (root).
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