What is the output of the following in-order traversal on the binary tree: 1, 2,

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Question: What is the output of the following in-order traversal on the binary tree: 1, 2, 3, 4, 5?

Options:

Correct Answer: 1, 2, 3, 4, 5

Solution:

In-order traversal visits the left subtree, then the node, and finally the right subtree, resulting in the sorted order of the nodes.

What is the output of the following in-order traversal on the binary tree: 1, 2, 3, 4, 5?

What is the output of the following in-order traversal on the binary tree: 1, 2, 3, 4, 5?

Step 1: Understand what in-order traversal means. It means we visit the left child, then the current node, and finally the right child.
Step 2: Visualize the binary tree with the nodes 1, 2, 3, 4, 5. Assume it is structured like this: 3 is the root, 2 is the left child of 3, 4 is the right child of 3, 1 is the left child of 2, and 5 is the right child of 4.
Step 3: Start the in-order traversal from the root (3). First, go to the left child (2).
Step 4: From node 2, go to its left child (1). Since 1 has no left child, visit node 1 and add it to the output.
Step 5: After visiting 1, go back to node 2. Visit node 2 and add it to the output.
Step 6: Node 2 has no right child, so go back to the root (3). Visit node 3 and add it to the output.
Step 7: Now, go to the right child of 3 (4).
Step 8: From node 4, go to its left child (which is none), so visit node 4 and add it to the output.
Step 9: Now go to the right child of 4 (5). Since 5 has no left child, visit node 5 and add it to the output.
Step 10: The final output of the in-order traversal is 1, 2, 3, 4, 5.

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