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Data Structures & Algorithms Interview Questions

Review this list of 347 Data Structures & Algorithms interview questions and answers verified by hiring managers and candidates.

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Sales Path
3 years ago14 answers
Given a list of jobs and a list of dependencies where each job depends on another job being completed first, determine if it is possible to complete all jobs.
2 years ago1 answer
Fizz Buzz
2 years ago
Given a matrix of m x n elements (m rows, n columns), return all elements of the matrix in clockwise spiral order. Has video answer
2 years ago
Implement Trie
+210 months ago4 answers
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How can you tell if a graph is not a tree?
10 years ago4 answers
BST Successor Search
5 months ago13 answers
Given a list of Nodes, each with a unique string id and a list of subnodes it depends on, find the maximum depth of the dependencies.
2 years ago1 answer
Squares of sorted array
2 years ago1 answer
Given a castle with rooms named after flowers where each room has an instruction to the next room, write an algorithm to find the rooms containing treasure.
a year ago1 answer
Sudoku Solver
+410 months ago4 answers
Decrypt Message
3 years ago13 answers
Permutations
+2a month ago8 answers
Find the equilibrium index in an array where sum of elements to the left is equal to sum of elements to the right.
a year ago1 answer
Shortest Cell Path
3 years ago14 answers
Find the largest perimeter of an island given a two-dimensional array of 1's and 0's representing land and water.
2 years ago1 answer
You're given a time-based key-value store that keeps having new key-value pairs added. Implement a windowed average.
a year ago1 answer
Find duplicate files in a file system. Has video answer
4 months ago1 answer
What is encapsulation?
2 years ago4 answers
Implement BFS traversal.
a year ago

Showing 161-180 of 347

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