O K-ary trees (discussed in class) can be implemented using the "first child, next sibling" method (discussed in the book). O A pre-order traversal visits children after processing the node itself. O A post-order traversal visits children after processing the node itself.
O K-ary trees (discussed in class) can be implemented using the "first child, next sibling" method (discussed in the book). O A pre-order traversal visits children after processing the node itself. O A post-order traversal visits children after processing the node itself.
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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Question
Please answer four, five and six

Transcribed Image Text:O If you can get from a parent to a child using a reference, then you can get back to the parent using the same reference (i.e. there us an "undirected
edge" between a parent and child so you can go from parent to child).
O Leaves have no children and the root cannot be a leaf.
O The height of a node is the length of the path from that node to the root.
O K-ary trees (discussed in class) can be implemented using the "first child, next sibling" method (discussed in the book).
O A pre-order traversal visits children after processing the node itself.
O A post-order traversal visits children after processing the node itself.
O A binary tree has at most 1 child per node (it is binary: 0 or 1 children).
O Recursion can be used to determine the number of nodes in a tree.
O Recursion cannot be used to determine the height of a tree (iteration must be used).
O The textbook provides implementations for pre-, post-, and in-order tree iterators.
Expert Solution

Step 1
Explanation:
4.
A K-ary tree is a collection of nodes normally represented hierarchically in the following fashion.
- The tree starts at the root node.
- Each node of the tree holds a list of references to its child nodes.
- The number of children a node has is less than or equal to n.
5. pre-order:
algorithm 1. Visit the root. 2. Traverse the left subtree 3. Traverse the right subtree
6. post-arder
Algorithm 1. Traverse the left subtree 2. Traverse the right subtree 3. Visit the root.
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