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Updated weekly · Last refresh Oct 17

Affinity solutions Data Engineer Interview Questions

The questions to prepare for a Affinity solutions Data Engineer interview. Questions from real interview reports rank first. Updated daily.

13questions
~2htotal time
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1
SQL & Data ManipulationStart here. 5 questions + 3 drills · ~70 min
Data Quality in a Data WarehouseMedium

Tests data quality controls, validation, and consistency strategies for analytics-ready datasets.

Data Qualitydata consistencyAffinity solutions
ELT vs ETL TradeoffsMedium

Tests understanding of data integration patterns and decision-making for pipeline architecture.

data processingETLELTAffinity solutions
Optimizing High-Volume Oracle SQLMedium

Tests SQL performance tuning skills for large-scale Oracle workloads.

Performance Tuningquery optimizationAffinity solutions
SSIS Error Logging and TroubleshootingMedium

Tests ETL pipeline reliability practices using SSIS, including logging and incident debugging.

data integrationerror handlingAffinity solutions
Optimize Large SQL QueryHard
Practice
Practice drill

Optimize a billion-row AWS query by reducing scanned data, pre-aggregating requests, and preserving daily performance metrics.

Performance Tuningdatabase optimizationdata processingAmazon Web Services
Optimizing Slow QueriesMedium
Practice
Practice drill

Analyze slow query workloads with filtered aggregation and an owner lookup.

Performance Tuningdatabase optimizationdata processingWaymo
Explain ETL ProcessMedium
Practice
Practice drill

Demonstrate ETL by extracting staged sales, cleaning values, validating records, and producing load-ready output.

data cleaningdata processingETLPlaidBristlecone
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2
Pipelines3 questions · ~24 min
Real-Time Ingestion on GCPHard

Tests real-time pipeline design skills on GCP for high-volume consumer transaction insights.

data pipelinereal-time ingestionAffinity solutions
Managing Compute Costs and MemoryHard

Tests cost and resource optimization techniques for large-scale processing of consumer data.

cost optimizationmemory managementdata processingAffinity solutions
CI/CD and Git for Data EngineeringMedium

Tests engineering discipline for testing, deployment, and versioning of data pipelines.

version controlCI/CDgitAffinity solutions

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3
Behavioral & Leadership5 questions · ~40 min
Maintaining Code Quality Under SpeedMedium

Tests ownership and prioritization in balancing delivery speed with maintainable mobile code and deliberate technical debt management.

best practicesfast-paced environmentcode maintainabilityAffinity solutions
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The finish line: interview-readyComplete all 13 questions plus 3 hands-on drills to finish this plan.