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Dropbox LeetCode Questions 2026

Browse LeetCode problems frequently asked by Dropbox. Filter by difficulty and timeframe to focus your interview prep.

Last updated: 20 Feb 2026

Timeframe

Difficulty

Problem	Difficulty	Frequency	Topics
Two Sum	EASY	100%	ArrayHash Table
Median of Two Sorted Arrays	HARD	100%	ArrayBinary SearchDivide and Conquer
Letter Combinations of a Phone Number	MEDIUM	100%	Hash TableStringBacktracking
Grid Illumination	HARD	100%	ArrayHash Table
Find Duplicate File in System	MEDIUM	100%	ArrayHash TableString
Simple Bank System	MEDIUM	100%	ArrayHash TableDesignSimulation
Word Break II	HARD	100%	ArrayHash TableStringDynamic ProgrammingBacktrackingTrieMemoization
Number of Islands	MEDIUM	62.5%	ArrayDepth-First SearchBreadth-First SearchUnion-FindMatrix
Web Crawler	MEDIUM	100%	StringDepth-First SearchBreadth-First SearchInteractive
Number of Valid Words for Each Puzzle	HARD	100%	ArrayHash TableStringBit ManipulationTrie
Word Pattern	EASY	100%	Hash TableString
Game of Life	MEDIUM	100%	ArrayMatrixSimulation
Word Pattern II	MEDIUM	100%	Hash TableStringBacktracking
Design a Text Editor	HARD	100%	Linked ListStringStackDesignSimulationDoubly-Linked List
Web Crawler Multithreaded	MEDIUM	100%	Depth-First SearchBreadth-First SearchConcurrency
Check If It Is a Good Array	HARD	100%	ArrayMathNumber Theory
Design Hit Counter	MEDIUM	100%	ArrayBinary SearchDesignQueueData Stream
Seat Reservation Manager	MEDIUM	100%	DesignHeap (Priority Queue)
Minimize Malware Spread	HARD	100%	ArrayHash TableDepth-First SearchBreadth-First SearchUnion-FindGraph Theory
Minimize Malware Spread II	HARD	100%	ArrayHash TableDepth-First SearchBreadth-First SearchUnion-FindGraph Theory

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