Walmart Labs interview questions

Showing 31–38 of 38 results

• Maximum Sum of Non-Adjacent Values in a RowMedium

  A coding problem that asks for the largest total obtainable from a row of non-negative values when no two chosen positions may be adjacent. It tests reasoning about take-or-skip choices, edge cases such as empty and single-element rows, and a solution fast enough for rows of up to 100,000 values.

  Walmart LabsSoftware EngineerCoding & AlgorithmsOnline Assessment
• Minimize Cost for Feature-Capable ModelsMedium

  This problem tests your ability to use greedy strategies or dynamic programming to satisfy coverage constraints while minimizing total costs from a set of available items.

  Walmart LabsSoftware EngineerCoding & AlgorithmsOnline Assessment
• Minimize the Maximum Edge on a PathMedium

  Find a path in a weighted undirected graph that minimizes its largest edge rather than the sum of weights. Handle parallel edges, disconnected vertices, and the start-equals-target case efficiently at large graph scale.

  Walmart LabsSoftware EngineerCoding & AlgorithmsOnline Assessment
• Predict Next-Period Conversion Rate Using Historical Campaign DataMedium

  This interview question evaluates core ML concepts, assumptions, math intuition, training/evaluation trade-offs, and practical failure modes in a realistic interview setting. A strong answer for Predict Next-Period Conversion Rate Using Historical Campaign Data states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.

  Walmart LabsData ScientistMachine LearningOnsite
• Product of All Other Elements for Each Index Without DivisionHard

  For each position of an integer array, compute the product of all the other elements in linear time and without using division. It tests careful handling of zeros, negative values and repeated values, and planning a single efficient pass when the obvious division shortcut is not allowed.

  Walmart LabsSoftware EngineerCoding & AlgorithmsOnsite
• Resolve Technical Conflict and Align Across TeamsEasy

  Practice explaining technical conflict, cross-team priorities, decision ownership, dissent, and the follow-through that turns agreement into working alignment.

  Walmart LabsMachine Learning EngineerBehavioral & LeadershipOnsite
• Shortest Talent-Covering Team Starting At Each IndexHard

  Practice a sliding-window coding question where each start index needs the shortest contiguous team containing every talent type. This prompt targets hash map counts, two-pointer window management, and O(n) reasoning for large arrays.

  Walmart LabsSoftware EngineerCoding & AlgorithmsTechnical Screen
• Understand Propensity Score Matching in Business AnalyticsMedium

  This interview question evaluates statistical assumptions, formulas, estimation strategy, uncertainty, edge cases, and interpretation in a realistic interview setting. A strong answer for Understand Propensity Score Matching in Business Analytics states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.

  Walmart LabsData ScientistStatistics & MathOnsite