ZorixOS
144+ Walmart questions

Walmart interview questions and how to prepare

The questions candidates report from Walmart interviews, sorted by how often they come up, with difficulty and topics, plus original practice written in Walmart's interview style.

Practice Walmart questions free All companies

ZorixOS tracks 144 community-reported Walmart interview questions, drawn from an open-source dataset of real interview reports and sorted by how frequently each one comes up. Every question links to its source. Alongside them are 98 original ZorixOS practice questions written in Walmart's known interview style (not claimed as asked at Walmart), so you can rehearse the real format. Practice any of them out loud in a free AI mock interview tuned to Walmart.

Updated July 2026

Walmart interview questions candidates report

Community-reported from real Walmart interviews (open-source dataset), most-asked first. Showing 60 of 144. Each links to its source.

  1. Advantage Shuffle
    ArrayTwo PointersGreedySorting
    Medium100% asked
  2. Longest Substring Without Repeating Characters
    Hash TableStringSliding Window
    Medium100% asked
  3. LRU Cache
    Hash TableLinked ListDesignDoubly-Linked List
    Medium100% asked
  4. Number of Islands
    ArrayDepth-First SearchBreadth-First SearchUnion-Find
    Medium100% asked
  5. Valid Parentheses
    StringStack
    Easy98% asked
  6. Two Sum
    ArrayHash Table
    Easy93% asked
  7. Search in Rotated Sorted Array
    ArrayBinary Search
    Medium92% asked
  8. Generate Parentheses
    StringDynamic ProgrammingBacktracking
    Medium91% asked
  9. Trapping Rain Water
    ArrayTwo PointersDynamic ProgrammingStack
    Hard91% asked
  10. Divide Intervals Into Minimum Number of Groups
    ArrayTwo PointersGreedySorting
    Medium88% asked
  11. Merge Intervals
    ArraySorting
    Medium88% asked
  12. Middle of the Linked List
    Linked ListTwo Pointers
    Easy88% asked
  13. Word Break
    ArrayHash TableStringDynamic Programming
    Medium86% asked
  14. Circular Permutation in Binary Representation
    MathBacktrackingBit Manipulation
    Medium86% asked
  15. Count Elements With Maximum Frequency
    ArrayHash TableCounting
    Easy86% asked
  16. Count Good Triplets in an Array
    ArrayBinary SearchDivide and ConquerBinary Indexed Tree
    Hard86% asked
  17. Find the N-th Value After K Seconds
    ArrayMathSimulationCombinatorics
    Medium86% asked
  18. Maximum Length Substring With Two Occurrences
    Hash TableStringSliding Window
    Easy86% asked
  19. Maximum Number of Tasks You Can Assign
    ArrayTwo PointersBinary SearchGreedy
    Hard86% asked
  20. Minimum Number of Operations to Make Arrays Similar
    ArrayGreedySorting
    Hard86% asked
  21. Minimum Operations to Make Array Equal II
    ArrayMathGreedy
    Medium86% asked
  22. Number of Ways to Separate Numbers
    StringDynamic ProgrammingPrefix Sum
    Hard86% asked
  23. The Winner University
    Database
    Easy86% asked
  24. XOR Operation in an Array
    MathBit Manipulation
    Easy86% asked
  25. Group Anagrams
    ArrayHash TableStringSorting
    Medium83% asked
  26. Maximum Distance Between Unequal Words in Array I
    ArrayString
    Easy80% asked
  27. Coin Change
    ArrayDynamic ProgrammingBreadth-First Search
    Medium80% asked
  28. Best Time to Buy and Sell Stock
    ArrayDynamic Programming
    Easy76% asked
  29. Combination Sum
    ArrayBacktracking
    Medium76% asked
  30. Longest Increasing Subsequence
    ArrayBinary SearchDynamic Programming
    Medium76% asked
  31. Longest Palindromic Substring
    Two PointersStringDynamic Programming
    Medium76% asked
  32. Course Schedule
    Depth-First SearchBreadth-First SearchGraph TheoryTopological Sort
    Medium73% asked
  33. Sliding Window Maximum
    ArrayQueueSliding WindowHeap (Priority Queue)
    Hard73% asked
  34. Sort Colors
    ArrayTwo PointersSorting
    Medium73% asked
  35. Zigzag Conversion
    String
    Medium73% asked
  36. Container With Most Water
    ArrayTwo PointersGreedy
    Medium72% asked
  37. Longest Consecutive Sequence
    ArrayHash TableUnion-Find
    Medium72% asked
  38. Max Stack
    Linked ListStackDesignDoubly-Linked List
    Hard72% asked
  39. Binary Tree Zigzag Level Order Traversal
    TreeBreadth-First SearchBinary Tree
    Medium71% asked
  40. Find Median from Data Stream
    Two PointersDesignSortingHeap (Priority Queue)
    Hard71% asked
  41. Median of Two Sorted Arrays
    ArrayBinary SearchDivide and Conquer
    Hard71% asked
  42. Spiral Matrix
    ArrayMatrixSimulation
    Medium71% asked
  43. 3Sum
    ArrayTwo PointersSorting
    Medium70% asked
  44. LFU Cache
    Hash TableLinked ListDesignDoubly-Linked List
    Hard70% asked
  45. Move Zeroes
    ArrayTwo Pointers
    Easy70% asked
  46. Permutation in String
    Hash TableTwo PointersStringSliding Window
    Medium70% asked
  47. Subarray Product Less Than K
    ArrayBinary SearchSliding WindowPrefix Sum
    Medium70% asked
  48. Subarray Sum Equals K
    ArrayHash TablePrefix Sum
    Medium70% asked
  49. First Unique Character in a String
    Hash TableStringQueueCounting
    Easy67% asked
  50. Kth Largest Element in an Array
    ArrayDivide and ConquerSortingHeap (Priority Queue)
    Medium67% asked
  51. Sort the Matrix Diagonally
    ArraySortingMatrix
    Medium67% asked
  52. Add Binary
    MathStringBit ManipulationSimulation
    Easy65% asked
  53. Binary Tree Right Side View
    TreeDepth-First SearchBreadth-First SearchBinary Tree
    Medium65% asked
  54. Design Hit Counter
    ArrayBinary SearchDesignQueue
    Medium65% asked
  55. Diagonal Traverse
    ArrayMatrixSimulation
    Medium65% asked
  56. Integer to Roman
    Hash TableMathString
    Medium65% asked
  57. Merge k Sorted Lists
    Linked ListDivide and ConquerHeap (Priority Queue)Merge Sort
    Hard65% asked
  58. Palindromic Substrings
    Two PointersStringDynamic Programming
    Medium65% asked
  59. Reverse Nodes in k-Group
    Linked ListRecursion
    Hard65% asked
  60. Rotting Oranges
    ArrayBreadth-First SearchMatrix
    Medium65% asked

These are the 60 most-reported of 144 tracked Walmart questions. Create a free account to drill the full set with solutions and an AI interviewer.

Practice questions in Walmart's style

Original ZorixOS questions written the way Walmart interviews, so you rehearse the real format. Not claimed as asked at Walmart.

  1. Imagine Walmart.com's search engine is returning slightly irrelevant results for 'organic kale'. How would you debug this issue, starting from the user's perspective and going down to the data processing pipeline?

    Software EngineerDebugging & ReasoningTests: Evaluates debugging skills, understanding of search pipelines, and problem-solving approach.

  2. Walmart is considering a new feature to allow users to pre-order groceries for pickup at a specific time slot, even if the items are not yet in stock. Design the backend system for this. Consider inventory management, time slot availability, and order fulfillment. How would you ensure scalability for peak holiday seasons?

    Software EngineerSystem DesignTests: Assesses system design capabilities, scalability considerations, and handling of complex business logic.

  3. Write a Python function to find the top K most frequently purchased items in a given date range from a hypothetical Walmart transaction log. The log is too large to fit into memory.

    Software EngineerCoding & AlgorithmsTests: Tests coding proficiency, algorithm knowledge (e.g., streaming algorithms, hash maps), and memory management.

  4. Walmart's mobile app has a feature to scan barcodes in-store to get product information and pricing. If users report that the scanner is sometimes slow or inaccurate, how would you approach diagnosing and fixing this problem, considering factors like camera quality, lighting conditions, and barcode variations?

    Software EngineerDebugging & ReasoningTests: Evaluates debugging skills in a real-world application context and understanding of mobile development challenges.

  5. Design a system to handle real-time price updates for millions of products across Walmart.com, ensuring consistency and low latency for customers.

    Software EngineerSystem DesignTests: Assesses design for distributed systems, consistency models, and real-time data processing.

  6. You are working on the recommendations engine for Walmart.com. Users are complaining that they see the same 'frequently bought together' items repeatedly. How would you investigate this and propose solutions to diversify recommendations while maintaining relevance?

    Software EngineerDebugging & ReasoningTests: Evaluates debugging, understanding of recommendation systems, and ability to balance different product goals.

92+ more Walmart-style questions are in the free library, each practiceable live with adaptive follow-ups and an honest scorecard. Start free.

Keep exploring

Can you answer these out loud, under Walmart-style follow-ups?

The ZorixOS AI interviewer runs a Walmart-tuned mock interview: it asks these kinds of questions, digs into your answers, and scores you against a real hiring bar. Your first one is free.

Start your Walmart mock interview
Walmart Interview Questions (2026) | ZorixOS