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UNCOMN Interview Questions

The questions to prepare for UNCOMN interviews, across all roles. Questions from real interview reports rank first. Updated weekly.

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1
PipelinesStart here. 9 questions · ~72 min
Data Quality in ETL PipelinesEasy

Approach for maintaining data quality and integrity across ETL pipelines.

IdempotencyData ModelingQualityUNCOMN
Batch vs Stream Processing Trade-offsMedium

Compare batch and stream processing across latency, complexity, cost, and data quality in a modern analytics pipeline.

InfrastructureStream ProcessingETLUNCOMN
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2
Execution8 questions · ~64 min
Prioritize Work Under Tight DeadlinesEasy

Explain how you prioritize competing work under time pressure while making trade-offs and keeping stakeholders aligned.

Trade-offsRoadmappingScope ManagementUNCOMN
Recover a Slipping ProjectMedium

Explain how you would diagnose and recover a project that is falling behind schedule without losing stakeholder trust.

Success CriteriaRoadmappingRisk AssessmentUNCOMN
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3
SQL & Data Manipulation3 questions + 3 drills · ~54 min
4
Coding4 questions · ~32 min
Time Complexity of Common StructuresMedium

Explain average and worst-case time complexities for arrays, hash tables, linked lists, and trees.

Hash TablesArraysTreesUNCOMN
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5
Behavioral & Leadership18 questions · ~145 min
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6
More topics2 questions · ~16 min
Define Success for a ProjectEasy

Define what success means for a project using clear KPIs, a north star, and supporting metrics.

KPIsSuccess CriteriaDiagnosisUNCOMN
Metrics for Project HealthEasy

Choose a practical set of leading and lagging metrics to judge whether a project is on track.

KPIsproject healthLeading IndicatorsUNCOMN
The finish line: interview-readyComplete all 44 questions plus 3 hands-on drills to finish this plan.