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Walmart Labs LeetCode Questions 2026

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

Last updated: 20 Feb 2026

Timeframe

Difficulty

Problem	Difficulty	Frequency	Topics
Two Sum	EASY	87.5%	ArrayHash Table
Longest Substring Without Repeating Characters	MEDIUM	100%	Hash TableStringSliding Window
Median of Two Sorted Arrays	HARD	75%	ArrayBinary SearchDivide and Conquer
Longest Palindromic Substring	MEDIUM	75%	Two PointersStringDynamic Programming
Container With Most Water	MEDIUM	62.5%	ArrayTwo PointersGreedy
Longest Common Prefix	EASY	50%	ArrayStringTrie
3Sum	MEDIUM	62.5%	ArrayTwo PointersSorting
Valid Parentheses	EASY	87.5%	StringStack
Generate Parentheses	MEDIUM	87.5%	StringDynamic ProgrammingBacktracking
Merge k Sorted Lists	HARD	62.5%	Linked ListDivide and ConquerHeap (Priority Queue)Merge Sort
Reverse Nodes in k-Group	HARD	62.5%	Linked ListRecursion
Search in Rotated Sorted Array	MEDIUM	75%	ArrayBinary Search
Valid Sudoku	MEDIUM	75%	ArrayHash TableMatrix
Combination Sum	MEDIUM	75%	ArrayBacktracking
First Missing Positive	HARD	62.5%	ArrayHash Table
Trapping Rain Water	HARD	87.5%	ArrayTwo PointersDynamic ProgrammingStackMonotonic Stack
Number of Ways to Separate Numbers	HARD	75%	StringDynamic ProgrammingSuffix Array
Group Anagrams	MEDIUM	75%	ArrayHash TableStringSorting
Pow(x, n)	MEDIUM	50%	MathRecursion
Maximum Subarray	MEDIUM	37.5%	ArrayDivide and ConquerDynamic Programming

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