What is the main disadvantage of using BFS?

Practice Questions

Q1
What is the main disadvantage of using BFS?
  1. It can be slower than DFS
  2. It requires more memory
  3. It cannot find paths
  4. It is not suitable for large graphs

Questions & Step-by-Step Solutions

What is the main disadvantage of using BFS?
  • Step 1: Understand what BFS (Breadth-First Search) is. It is a method for exploring nodes in a graph or tree level by level.
  • Step 2: Recognize that BFS starts at the root node and explores all its neighbors before moving to the next level.
  • Step 3: Note that while exploring, BFS keeps track of all nodes at the current level in memory.
  • Step 4: Realize that if the graph or tree is very wide (has many nodes at each level), BFS will need a lot of memory to store all those nodes.
  • Step 5: Conclude that the main disadvantage of BFS is its high memory usage, especially for large graphs or trees.
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