In Depth-First Search (DFS), which data structure is primarily used?

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Question: In Depth-First Search (DFS), which data structure is primarily used?

Options:

Correct Answer: Stack

Solution:

DFS uses a stack to keep track of the nodes to be explored, either explicitly or through recursion.

In Depth-First Search (DFS), which data structure is primarily used?

In Depth-First Search (DFS), which data structure is primarily used?

Step 1: Understand that Depth-First Search (DFS) is a method for exploring nodes in a graph or tree.
Step 2: Recognize that DFS needs a way to remember which nodes to visit next.
Step 3: Learn that a stack is a data structure that works like a stack of plates, where you can only add or remove the top plate.
Step 4: Realize that in DFS, we use a stack to keep track of the nodes we need to explore.
Step 5: Note that this stack can be implemented explicitly (by creating a stack data structure) or implicitly (using the call stack in recursion).

Depth-First Search (DFS) – A graph traversal algorithm that explores as far as possible along each branch before backtracking.
Stack Data Structure – A collection of elements that follows the Last In, First Out (LIFO) principle, used to manage the nodes in DFS.
Recursion – A programming technique where a function calls itself, often used in DFS to explore nodes without an explicit stack.