Put the following values into a binary search tree from left to right order: 37 21 27 5 22 13 36 18 What is the 4th value printed out by the tree if a post order traversal is run on it?
Put the following values into a binary search tree from left to right order: 37 21 27 5 22 13 36 18 What is the 4th value printed out by the tree if a post order traversal is run on it?
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Transcribed Image Text:**Binary Search Tree Question**
**Task:**
Put the following values into a binary search tree from left to right order:
37, 21, 27, 5, 22, 13, 36, 18
**Question:**
What is the 4th value printed out by the tree if a post-order traversal is run on it?
**Options:**
- ○ 27
- ○ 22
- ● 5
- ○ 18
Transcribed Image Text:### Tree Traversal Type Identification
**Code Example:**
```java
void traverse(TreeNode tree) {
if (tree != null) {
System.out.print(tree.getValue() + " ");
traverse(tree.getLeft());
traverse(tree.getRight());
}
}
```
**Question:** What type of tree traversal is this?
- **Options:**
- in order
- **pre order** *(selected)*
- post order
- reverse
**Explanation:**
This code snippet demonstrates a **pre-order traversal** of a binary tree. In pre-order traversal, the process is as follows:
1. Visit the root node.
2. Traverse the left subtree recursively.
3. Traverse the right subtree recursively.
The function first prints the root node's value, then recursively visits the left and right children in that specific order, confirming it as a pre-order traversal.
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