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Which traversal method visits the root node last?

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Question: Which traversal method visits the root node last?

Options:

  1. In-order
  2. Pre-order
  3. Post-order
  4. Level-order

Correct Answer: Post-order

Solution: 

Post-order traversal visits the root node last, after visiting both left and right subtrees.

Which traversal method visits the root node last?

Practice Questions

Q1
Which traversal method visits the root node last?
  1. In-order
  2. Pre-order
  3. Post-order
  4. Level-order

Questions & Step-by-Step Solutions

Which traversal method visits the root node last?
  • Step 1: Understand what a tree is. A tree is a data structure with nodes, where each node can have a left and right child.
  • Step 2: Learn about tree traversal methods. These are ways to visit all the nodes in a tree.
  • Step 3: Identify the three main traversal methods: Pre-order, In-order, and Post-order.
  • Step 4: In Pre-order traversal, you visit the root node first, then the left subtree, and finally the right subtree.
  • Step 5: In In-order traversal, you visit the left subtree first, then the root node, and finally the right subtree.
  • Step 6: In Post-order traversal, you visit the left subtree first, then the right subtree, and finally the root node.
  • Step 7: Conclude that Post-order traversal is the method that visits the root node last.
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