Depth First Search (DFS) Interview Questions
Browse depth-first search (DFS) technical interview questions and explore the world's largest library of mock video interview recordings.
Depth First Search (DFS) Interview questions and solutions
Get step-by-step instructions on how to approach and solve common technical interview questions.
MEDIUM
Find Leaves of Binary Tree
Given a binary tree, extract all the leaves in repeated succession into a list of lists by starting at the bottom and working your way upwards.
TREESDEPTH FIRST SEARCH (DFS)RECURSION
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MEDIUM
Data Structures and Algorithms
Count Complete Tree Nodes
Given the root of a complete binary tree, return the number of nodes in the tree.
TREESBINARY TREESSEARCHDEPTH FIRST SEARCH (DFS)
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MEDIUM
Data Structures and Algorithms
Number of Islands
Given a 2D matrix, where "1" represents land and "0" represents water, count how many islands are present.
ARRAYSSORTINGDEPTH FIRST SEARCH (DFS)BREADTH FIRST SEARCH (BFS)MATRICESUNION FIND
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MEDIUM
Data Structures and Algorithms
Boundary of Binary Tree
The boundary of a binary tree is the concatenation of the root, the left boundary, the leaves ordered from left-to-right, and the reverse order of the right boundary.
BINARY TREESDEPTH FIRST SEARCH (DFS)TREES
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