Which of the following is true about the level-order traversal of a binary tree?
Practice Questions
Q1
Which of the following is true about the level-order traversal of a binary tree?
It is depth-first
It uses a stack
It visits nodes level by level
It is faster than in-order traversal
Questions & Step-by-Step Solutions
Which of the following is true about the level-order traversal of a binary tree?
Step 1: Understand what a binary tree is. A binary tree is a structure where each node has at most two children, referred to as the left child and the right child.
Step 2: Learn what level-order traversal means. Level-order traversal means visiting all the nodes at the present depth level before moving on to nodes at the next depth level.
Step 3: Realize that level-order traversal starts from the root node, which is the topmost node of the tree.
Step 4: Note that to perform level-order traversal, we typically use a queue. A queue is a data structure that follows the First In First Out (FIFO) principle.
Step 5: Begin by adding the root node to the queue. Then, while the queue is not empty, do the following: remove the front node from the queue, visit it (process it), and add its left and right children to the queue if they exist.
Step 6: Continue this process until all nodes have been visited, ensuring that nodes are processed level by level.
