Top 50 Queue Interview Questions
The most frequently asked Queue questions across all roles and companies, ranked by real interview frequency. Updated daily.
Implement an LRU cache in O(1) average time using a hash table and doubly linked list.
Allianz
ICF
InsuletTraverse a graph from a start node using BFS and DFS, returning the visit order for each traversal.
Siemens
Simple Tire
InformaticaSimulate FIFO queue operations using two LIFO stacks with amortized O(1) processing.
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Generac Power Systems
Sabre SystemsSimulate Unity Editor undo-stack operations using only queue behavior and preserve LIFO results.
DWS GroupPPrivate Practice
Cambia Health SolutionsSign up to see every question
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Traverse a binary tree level by level using a queue-based breadth-first search.
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Amplifi Group
Expedia GroupImplement BFS to traverse a graph level by level from a given start node.
Zensar Technologies
Dover India
OneTrustFind the minimum-cost path between two nodes in a weighted graph using Dijkstra's algorithm.
BairesDev
Bow Wave
ReverbProblem Given the root of a binary tree, return its maximum depth as an integer. The maximum depth is the number of nodes along the longest path from the ...
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