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Updated weekly · Last refresh Aug 30

ADP Data Engineer Interview Questions

The questions to prepare for a ADP Data Engineer interview. Questions from real interview reports rank first. Updated weekly.

20questions
~3htotal time
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1
SQL & Data ManipulationStart here. 4 questions + 2 drills · ~55 min
Contact Center Agent Performance MetricsHard
Practice
Recently asked

Compute daily agent call KPIs and SLA using joins, aggregations, and window ranking in a contact center model.

ETLAggregationsData ModelingADP
Consumption-Ready Data ModelsMedium
Recently asked

Tests your approach to modeling for downstream analytics consumers at ADP.

ETLData ModelingQualityADP
Validate Bank Reconciliation CompletenessHard
Practice
Practice drill

Compare ledger and bank transactions to flag unmatched items and reconciliation gaps.

Data WranglingReconciliationAggregationsADP
Second Highest Trader SalaryEasy
Practice
Recently asked
Practice drill

Find the second highest distinct salary from a single table using basic PostgreSQL ordering and limiting.

SubqueriesRankingSortingeClinicalWorksInformaticaSpectraforce Technologies
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2
Coding4 questions · ~35 min
Spark Narrow vs Wide DependenciesMedium
Recently asked

Explain how narrow and wide Spark dependencies differ, when shuffles occur, and how they affect performance and fault recovery.

Data ModelingADP
Tune a Slow PySpark JobHard
Recently asked

Tests your performance tuning skills for large-scale PySpark workloads.

efficiencyData ModelingoptimizationADP
Flattening JSON in PythonMedium
Recently asked

Tests your Python skills for transforming semi-structured data into analytics-ready tables.

Data WranglingStringsData ModelingADP
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3
Pipelines12 questions · ~106 min
ETL vs ELT and Ingestion ModesMedium
Recently asked

Tests your design choices for ingestion patterns and transformation strategies in data pipelines.

Stream ProcessingETLData ModelingADP
Maintainable Data Integration WorkflowsMedium
Recently asked

Tests your engineering practices for reliability, observability, and long-term maintainability.

ETLData ModelingQualityADP
Designing a Data HubHard
Recently asked

Tests your ability to design shared data products, interfaces, and governance for internal teams.

InfrastructureData ModelingQualityADP
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The finish line: interview-readyComplete all 20 questions plus 2 hands-on drills to finish this plan.