Question: In which order does BFS visit nodes in a graph?
Options:
Pre-order
In-order
Post-order
Level-order
Correct Answer: Level-order
Solution:
BFS visits nodes in level-order, exploring all neighbors at the present depth prior to moving on to nodes at the next depth level.
In which order does BFS visit nodes in a graph?
Practice Questions
Q1
In which order does BFS visit nodes in a graph?
Pre-order
In-order
Post-order
Level-order
Questions & Step-by-Step Solutions
In which order does BFS visit nodes in a graph?
Step 1: Start at the initial node (the root node) of the graph.
Step 2: Visit all the neighbors of the initial node. These are the nodes directly connected to it.
Step 3: After visiting all neighbors of the initial node, move to the next level of nodes. This means you will now visit the neighbors of the nodes you just visited.
Step 4: Continue this process: for each new node you visit, explore all its neighbors before moving on to the next node at the same level.
Step 5: Repeat this process until all nodes in the graph have been visited.
Breadth-First Search (BFS) – BFS is a graph traversal algorithm that explores all nodes at the present depth level before moving on to nodes at the next depth level.
Level-order Traversal – The method of visiting nodes level by level, ensuring that all nodes at a given depth are processed before any nodes at a deeper level.
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