Level-order traversal means visit the nodes at each level, one level at at time, starting with the root.

Name: Level-order traversal means visit the nodes at each level, one level at at time, starting with the root.
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Level-order traversal involves visiting all the nodes in a tree level by level, starting from the root, which means each level is completely visited before moving to the next level.

Level-Order Traversal Means Visit the Nodes at Each Level, One