Invert Binary Tree – Part 2

The video tutorial explains the process of inverting a binary tree using recursion. It begins with an introduction to the concept of tree inversion, followed by a detailed explanation of swapping subtrees. The tutorial then delves into the recursive process of inverting tree nodes, emphasizing the importance of base cases to prevent infinite loops. The video concludes with a summary of key concepts, including recursion, base cases, and the structure of binary trees.

What is the initial input taken by the function in the tree inversion process?

• Temporary variable

• Leaf node

• Root node

• Subtree

In the context of the video, what is a 'leaf node'?

• A node that is the root

• A node with no children

• A node with two children

• A node with one child

What is the significance of the 'root' in the tree inversion process?

• It is the starting point for inversion

• It is the node with the highest value

• It is always a leaf node

• It is the node with the lowest value

What is the primary operation performed repeatedly in the tree inversion process?

• Adding nodes

• Swapping subtrees

• Deleting nodes

• Balancing the tree

What is the result of swapping the left and right subtrees of a node?

• The node becomes a leaf

• The tree becomes unbalanced

• The node is deleted

• The subtrees are exchanged

During the recursive call for the left subtree, what is checked first?

• If the node is a leaf

• If the node is the root

• If the node is null

• If the node has children

What happens when a node is found to be null during the recursive process?

• The function continues to the next node

• The function adds a new node

• The function swaps the node

• The function returns null

What should be done if a node's left and right children are both null?

• Add new children

• Swap them

• Return the node

• Delete the node

What is the purpose of returning the root node in the recursive function?

• To ensure the function terminates

• To add a new node to the tree

• To maintain the tree structure

• To satisfy the return type requirement

Why is it important to include a base case in recursive functions?

• To prevent infinite loops

• To improve performance

• To add complexity

• To simplify the code