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Database System Concepts
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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Examine the BST below, and recall that a tree is just an acyclic (and, in this case, undirected) graph. Let's say we start at node 12 and want to determine if a path exists to node 29. List the order in which our method will visit the nodes of the tree, assuming a) we are using depth-first search (DFS), b) our method visits the left subtree before it visits the right subtree, and c) our method terminates when we reach node 29. NOTE 1: This question is asking you for a single sequence of nodes that meet all three criteria. It is NOT asking for three separate sequences (one for each criterion). NOTE 2: You do not have to list any nodes to which you "return" during your traversal. No node in your sequence should be listed more than once. 12 10 21 11 17 29 23
Transcribed Image Text:Examine the BST below, and recall that a tree is just an acyclic (and, in this case, undirected) graph. Let's say we start at node 12 and want to determine if a path exists to node 29. List the order in which our method will visit the nodes of the tree, assuming a) we are using depth-first search (DFS), b) our method visits the left subtree before it visits the right subtree, and c) our method terminates when we reach node 29. NOTE 1: This question is asking you for a single sequence of nodes that meet all three criteria. It is NOT asking for three separate sequences (one for each criterion). NOTE 2: You do not have to list any nodes to which you "return" during your traversal. No node in your sequence should be listed more than once. 12 10 21 11 17 29 23
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