What traversal method would you use to delete a binary tree?
Practice Questions
Q1
What traversal method would you use to delete a binary tree?
Pre-order
In-order
Post-order
Level-order
Questions & Step-by-Step Solutions
What traversal method would you use to delete a binary tree?
Step 1: Understand what a binary tree is. A binary tree is a structure where each node has at most two children, called the left child and the right child.
Step 2: Learn about tree traversal methods. Traversal methods are ways to visit all the nodes in a tree. Common methods include pre-order, in-order, and post-order.
Step 3: Focus on post-order traversal. In post-order traversal, you visit the left child, then the right child, and finally the node itself.
Step 4: Recognize why post-order is used for deletion. By visiting the children first, you ensure that you delete the children before deleting the parent node. This prevents trying to access a child that has already been deleted.
Step 5: Apply post-order traversal to delete a binary tree. Start from the root, go to the left child, then the right child, and delete them before deleting the root.
