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Cloudflare LeetCode Questions 2026

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

Last updated: 10 July 2026

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Timeframe

Difficulty

Problem	Difficulty	Frequency	Topics
3Sum	MEDIUM	87.5%	ArrayTwo PointersSorting
4Sum	MEDIUM	75%	ArrayTwo PointersSorting
Design a Stack With Increment Operation	MEDIUM	87.5%	ArrayStackDesign
Design Circular Queue	MEDIUM	100%	ArrayLinked ListDesignQueue
Design Hit Counter	MEDIUM	62.5%	ArrayBinary SearchDesignQueueData Stream
Number of Islands	MEDIUM	62.5%	ArrayDepth-First SearchBreadth-First SearchUnion-FindMatrix
Reaching Points	HARD	87.5%	Math
LRU Cache	MEDIUM	75%	Hash TableLinked ListDesignDoubly-Linked List
Logger Rate Limiter	EASY	62.5%	Hash TableDesignData Stream
Merge k Sorted Lists	HARD	62.5%	Linked ListDivide and ConquerHeap (Priority Queue)Merge Sort
Course Schedule	MEDIUM	62.5%	Depth-First SearchBreadth-First SearchGraph TheoryTopological Sort

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