Which data structure is used to implement depth-first search in a binary tree?
Practice Questions
Q1
Which data structure is used to implement depth-first search in a binary tree?
Queue
Stack
Array
Linked List
Questions & Step-by-Step Solutions
Which data structure is used to implement depth-first search in a binary tree?
Step 1: Understand what depth-first search (DFS) means. It is a way to explore all the nodes in a binary tree by going as deep as possible down one branch before backtracking.
Step 2: Know that DFS can be implemented using two main methods: recursion and an explicit stack.
Step 3: If using recursion, the call stack of the programming language acts as the stack for DFS.
Step 4: If implementing DFS without recursion, you need to use a stack data structure to keep track of the nodes to visit next.
Step 5: When you visit a node, you push its children onto the stack. Then, you pop a node from the stack to visit it next.
