Top 27
Prep plan
Updated weekly · Last refresh Oct 17

Walmart Labs Software Engineer Interview Questions

The questions to prepare for a Walmart Labs Software Engineer interview. Questions from real interview reports rank first. Updated daily.

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1
CodingStart here. 9 questions · ~79 min
Two Sum with TargetEasy
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Use a hash map to find two array elements that sum to a target in O(n) time.

Hash TablesArraysStringsWalmart Labs
Shortest Unique-Character SubstringMedium
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Tests sliding-window and string algorithm skills with careful handling of character counts.

Walmart Labs
Island Counting IIMedium
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Assesses your approach to dynamic graph updates and efficient state tracking.

dfsWalmart Labs
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2
System Design4 questions · ~35 min
Real-Time Inventory ServiceHard
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Evaluates system design skills for low-latency inventory updates at Walmart Labs scale, including caching, availability, and conflict resolution.

inventoryWalmart Labs
Ledger System DesignHard
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Evaluates your ability to design a ledger system with clear functional and non-functional requirements.

Walmart Labs
Covid Contact Tracing App DesignHard
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Assesses your ability to design end-to-end systems with privacy, scalability, and reliability concerns.

Walmart Labs
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3
Behavioral & Leadership12 questions · ~105 min
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4
More topics2 questions · ~18 min
Distributed Systems Trade-offsHard
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Evaluates distributed systems design judgment and ability to explain trade-offs.

Trade-offsdistributed systemsWalmart Labs
Troubleshooting a System IssueMedium
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Evaluates your debugging approach, use of evidence, and escalation judgment.

TroubleshootingWalmart Labs
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