Top 23
Prep plan
Updated weekly · Last refresh Aug 30

One Drop Software Engineer Interview Questions

The questions to prepare for a One Drop Software Engineer interview. Questions from real interview reports rank first. Updated weekly.

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~4htotal time
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1
CodingStart here. 7 questions · ~73 min
Palindrome Function ImplementationEasy
Practice

Determine whether a string reads the same forward and backward using a two-pointer scan.

RecursionStringsTwo PointersOne Drop
Two Sum with TargetEasy
Practice

Use a hash map to find two array elements that sum to a target in O(n) time.

Hash TablesArraysStringsOne Drop
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2
Execution4 questions · ~42 min
Choose Monolith or MicroservicesMedium

Evaluate the execution trade-offs between monoliths and microservices and explain how you would choose the right approach.

Trade-offsRisk AssessmentScope ManagementOne Drop
Quality Under Tight DeadlineMedium

Explain how you protect quality on a fixed-deadline engineering project by managing scope, risks, and release criteria.

Launch PlanningTrade-offsScope ManagementOne Drop
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3
Behavioral & Leadership8 questions · ~83 min
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4
More topics4 questions · ~42 min
Design a URL Shortening ServiceHard

Design a URL shortening service that routes, ranks, and monitors links at scale.

Feature StoreModel ServingOne Drop
Real-Time Health Data ArchitectureHard

Tests your ability to design reliable, low-latency pipelines for streaming diabetes data at scale.

InfrastructureStream ProcessingOrchestrationOne Drop
Optimize a Slow SQL QueryMedium

Tests your performance troubleshooting skills for dv01-scale reporting queries.

JoinsData WranglingCTEsOne Drop
Cloud Benefits for App DevelopmentEasy

Tests your understanding of cloud tradeoffs and how you apply them to build scalable software.

InfrastructureToolsOne Drop

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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
The finish line: interview-readyComplete all 23 questions plus 3 hands-on drills to finish this plan.