Python 3: Project-based Python, Algorithms, Data Structures - Hash project 3: Add update functionality

The video tutorial introduces trees as nonlinear data structures, focusing on binary and binary search trees. It explains tree structures, including root, child, and leaf nodes, and outlines rules such as no cycles and single parentage. Applications in computing, like organizational charts and decision trees, are discussed. The tutorial delves into binary trees, highlighting their rules and operations, and explains binary search trees' efficiency in search, insert, and delete operations. It concludes with tree traversal methods, emphasizing inorder traversal for sorted output.

What is a key difference between trees and linear data structures like linked lists?

• Trees are always balanced.

• Trees have multiple roots.

• Trees do not have leaf nodes.

• Trees are nonlinear and can have multiple child nodes.

Which of the following is NOT allowed in a tree structure?

• A node having multiple parents.

• A node having multiple children.

• A node having no children.

• A tree having a single root.

What is the height of a tree?

• The number of levels from the root to the leaf nodes.

• The number of edges in the tree.

• The number of child nodes a root has.

• The number of nodes in the tree.

Which of the following is an example of a tree structure in computing?

• A linear array.

• A Unix file system.

• A stack.

• A queue.

What is a decision tree primarily used for in machine learning?

• Balancing data.

• Storing data.

• Making decisions based on data.

• Sorting data.

In a binary tree, what is the maximum number of children a node can have?

• Four

• One

• Two

• Three

What rule does a binary search tree impose on its nodes?

• All nodes must have the same value.

• All nodes must have two children.

• Left child nodes must be smaller, and right child nodes must be greater than the parent node.

• All nodes must be leaf nodes.

What is the time complexity of operations in a balanced binary search tree?

• O(n)

• O(log n)

• O(n^2)

• O(1)

What is the purpose of tree traversal methods?

• To balance the tree.

• To delete nodes from the tree.

• To find the height of the tree.

• To visit all nodes in a specific order.

Which traversal method provides a sorted representation of a binary search tree?

• Post-order traversal

• Pre-order traversal

• Inorder traversal

• Level-order traversal