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Walmart Labs Interview Questions — 27 Questions

Walmart Labs

27 problems across 5 categories

Title	Difficulty	Updated
Evaluate Last-Mile Product Metric Changes Data AnalystProduct Sense	Medium	Apr 16, 2026
Implement lexicographically smallest Two Sum Software EngineerCoding	Medium	Mar 4, 2026
Design an online ticket marketplace Software EngineerSystem Design	Medium	Mar 4, 2026
Implement a Shape interface using OOP Software EngineerCoding	Medium	Mar 1, 2026
Design a multi-carrier parcel delivery system Software EngineerSystem Design	Medium	Mar 1, 2026
Count ways to make change (DP) Software EngineerCoding	Medium	Mar 1, 2026
Compute days until plants stop dying Software EngineerCoding	Medium	Mar 1, 2026
Check whether brackets are balanced Software EngineerCoding	Medium	Mar 1, 2026
Find shared courses between student pairs Software EngineerCoding	Medium	Jan 6, 2026
Design Spring Boot for high availability and background work Software EngineerSystem Design	Medium	Jan 6, 2026
Answer Spring Boot and Thymeleaf engineering questions Software EngineerCoding	Medium	Jan 6, 2026
Merge two sorted arrays in-place Software EngineerCoding	Easy	Dec 9, 2025
Handle conflict and motivate engineering teams Software EngineerBehavioral	Easy	Dec 9, 2025
Design aggregator for multiple downstream services Software EngineerSystem Design	Easy	Dec 9, 2025
Find first non-repeating character Machine Learning EngineerCoding	Easy	Dec 7, 2025
Design an LLM agent with RAG and tools Machine Learning Engineer	Easy	Dec 7, 2025
Design an item category prediction system Machine Learning EngineerSystem Design	Easy	Dec 7, 2025
Describe past projects and impact Software EngineerBehavioral	Medium	Sep 6, 2025
Compute maximum simultaneous bus routes Software EngineerCoding	Medium	Sep 6, 2025
Understand Propensity Score Matching in Business Analytics Data Scientist	Medium	Aug 4, 2025
Predict Next-Period Conversion Rate Using Historical Campaign Data Data Scientist	Medium	Aug 4, 2025
Find Index Pairs of Matching Elements in Arrays Data ScientistCoding	Medium	Aug 4, 2025
Evaluate K-Fold Cross-Validation for Model Selection Data Scientist	Medium	Aug 4, 2025
Calculate Sample Size for Effective A/B Test Design Data ScientistProduct Sense	Medium	Aug 4, 2025
Assess Cultural Fit in Informal Hiring Conversations Data ScientistBehavioral	Medium	Aug 4, 2025
Provide self introduction, achievements, automation challenges, code quality, mentoring Software EngineerBehavioral	Medium	Jul 26, 2025
Design airplane seatback entertainment with UI focus Software EngineerSystem Design	Hard	Jul 26, 2025