In a level-order traversal, which data structure is typically used to keep track

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Question: In a level-order traversal, which data structure is typically used to keep track of nodes?

Options:

Correct Answer: Queue

Solution:

A queue is used in level-order traversal to keep track of nodes at the current level.

In a level-order traversal, which data structure is typically used to keep track of nodes?

In a level-order traversal, which data structure is typically used to keep track of nodes?

Step 1: Understand what level-order traversal means. It is a way to visit all the nodes in a tree level by level, starting from the root.
Step 2: Recognize that in level-order traversal, we need to keep track of which nodes we are currently visiting.
Step 3: Learn that a queue is a data structure that works like a line of people waiting. You can add people to the end of the line and take the person at the front of the line.
Step 4: Realize that we use a queue in level-order traversal to store the nodes we need to visit next. We add the root node to the queue first.
Step 5: As we visit each node, we remove it from the front of the queue and add its children (if any) to the back of the queue.
Step 6: Continue this process until the queue is empty, which means we have visited all the nodes in the tree.

Level-order Traversal – A method of traversing a tree where nodes are visited level by level from top to bottom and left to right.
Queue Data Structure – A linear data structure that follows the First In First Out (FIFO) principle, commonly used to manage nodes in level-order traversal.