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Walmart Labs Interview Questions (143)

Coding problems reported from Walmart Labs interviews and online assessments.

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A private sheet of Walmart Labs's most asked problems with a two-week finish date.
Questions143
Easy22
Medium95
Hard26
Asked in 30 days1as of 16 Aug 2026
Asks mostArray 81String 36Hash Table 35Dynamic Programming 21Two Pointers 20Sorting 18Breadth-First Search 16Math 15Stack 14Binary Search 13
Most asked first
TitleSolutionAcceptDifficultyAsked
3. Longest Substring Without Repeating CharactersVideo
Solution39.9%Medium
Last 6 months
20. Valid ParenthesesVideo
Solution45.2%Easy
22. Generate ParenthesesVideo
Solution79.6%Medium
49. Group AnagramsVideo
Solution73.0%Medium
Last 3 months
139. Word BreakVideo
Solution49.8%Medium
1977. Number of Ways to Separate NumbersVideo
Solution21.7%Hard
3090. Maximum Length Substring With Two OccurrencesVideo
Solution77.4%Easy
5. Longest Palindromic SubstringVideo
Solution38.7%Medium
6. Zigzag ConversionVideo
Solution54.9%Medium
Last 6 months
567. Permutation in StringVideo
Solution49.8%Medium
Last 6 months
3696. Maximum Distance Between Unequal Words in Array IVideoPremium
Solution81.7%Easy
12. Integer to RomanVideo
Solution71.8%Medium
14. Longest Common PrefixVideo
Solution48.0%Easy
44. Wildcard MatchingVideo
Solution32.8%Hard
67. Add BinaryVideo
Solution58.4%Easy
76. Minimum Window SubstringVideo
Solution48.3%Hard
91. Decode WaysVideo
Solution38.3%Medium
387. First Unique Character in a StringVideo
Solution66.4%Easy
402. Remove K DigitsVideo
Solution37.7%Medium
556. Next Greater Element IIIVideo
Solution35.2%Medium
647. Palindromic SubstringsVideo
Solution73.2%Medium
1209. Remove All Adjacent Duplicates in String IIVideo
Solution61.7%Medium
1249. Minimum Remove to Make Valid ParenthesesVideo
Solution71.3%Medium
13. Roman to IntegerVideo
Solution67.0%Easy
72. Edit DistanceVideo
Solution61.5%Medium
79. Word SearchVideo
Solution48.2%Medium
125. Valid PalindromeVideo
Solution54.2%Easy
227. Basic Calculator IIVideo
Solution47.3%Medium
395. Longest Substring with At Least K Repeating CharactersVideo
Solution46.8%Medium
438. Find All Anagrams in a StringVideo
Solution54.7%Medium
451. Sort Characters By FrequencyVideo
Solution75.8%Medium
730. Count Different Palindromic SubsequencesVideo
Solution48.2%Hard
1143. Longest Common SubsequenceVideo
Solution59.6%Medium
2423. Remove Letter To Equalize FrequencyVideo
Solution19.3%Easy
224. Basic CalculatorVideo
Solution47.3%Hard
394. Decode StringVideo
Solution63.0%Medium
Showing 1–36 of 36