QUESTIONS BY COMPANY

Cisco LeetCode Questions 2026

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

Last updated: 20 Feb 2026

Timeframe

Difficulty

Problem	Difficulty	Frequency	Topics
Two Sum	EASY	37.5%	ArrayHash Table
Add Two Numbers	MEDIUM	62.5%	Linked ListMathRecursion
Longest Substring Without Repeating Characters	MEDIUM	62.5%	Hash TableStringSliding Window
Longest Palindromic Substring	MEDIUM	100%	Two PointersStringDynamic Programming
3Sum	MEDIUM	37.5%	ArrayTwo PointersSorting
Valid Parentheses	EASY	62.5%	StringStack
Merge k Sorted Lists	HARD	37.5%	Linked ListDivide and ConquerHeap (Priority Queue)Merge Sort
Trapping Rain Water	HARD	50%	ArrayTwo PointersDynamic ProgrammingStackMonotonic Stack
Rotate Image	MEDIUM	87.5%	ArrayMathMatrix
Maximum Subarray	MEDIUM	62.5%	ArrayDivide and ConquerDynamic Programming
Spiral Matrix	MEDIUM	87.5%	ArrayMatrixSimulation
Merge Intervals	MEDIUM	62.5%	ArraySorting
Merge Sorted Array	EASY	37.5%	ArrayTwo PointersSorting
Maximum Difference Between Increasing Elements	EASY	62.5%	Array
Best Time to Buy and Sell Stock	EASY	50%	ArrayDynamic Programming
Number of Valid Words in a Sentence	EASY	75%	String
Gas Station	MEDIUM	37.5%	ArrayGreedy
Linked List Cycle	EASY	62.5%	Hash TableLinked ListTwo Pointers
LRU Cache	MEDIUM	75%	Hash TableLinked ListDesignDoubly-Linked List
Max Points on a Line	HARD	50%	ArrayHash TableMathGeometry

Need Help Solving These Problems?

CodingInterviewAI can instantly identify algorithms and generate optimal solutions for any LeetCode problem. Get step-by-step explanations and ace your next technical interview.

CodingInterviewAI

Home Blog Give Feedback

Legal

Terms of Use Privacy Policy Legal Notice