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Updated weekly · Last refresh Oct 17

Ipsos Data Engineer Interview Questions

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

20questions
~3htotal time
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1
PipelinesStart here. 9 questions · ~72 min
Design Real-Time Feature PipelineHard

Design a real-time feature pipeline processing 120K events/sec into low-latency feature tables and warehouse models with replay and quality controls.

InfrastructureStream ProcessingOrchestrationIpsos
Consistency Across Data SourcesMedium

Approach for keeping records aligned and trustworthy when multiple source systems feed the same pipeline.

InfrastructureQualityIpsos
Cloud Storage in Data PipelinesEasy

Discuss how cloud storage fits into ETL pipelines, including staging, data quality, and operational monitoring.

InfrastructureETLIpsos
Data Quality and Schema EvolutionMedium

Approach for handling schema changes and data quality checks in a high-volume data lake pipeline.

schema evolutionData ModelingQualityIpsos
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2
SQL & Data Manipulation3 questions + 3 drills · ~54 min
Optimizing Slow SQL QueriesMedium

Evaluates performance tuning skills for production-grade SQL workloads.

Data ManipulationIpsos
Optimizing Slow SQL in ProductionMedium

Assesses systematic troubleshooting and optimization for high-impact SQL performance issues.

Ipsos
Data Warehouse vs Data Lake ChoiceMedium

Evaluates decision-making for selecting data platforms based on requirements and constraints.

data warehousedata architectureIpsos
Second Highest Without AggregatesHard
Practice
Practice drill

Find the second highest salary in each department without using aggregate functions.

SubqueriesRankingSelf-JoinsCredit GenieDevoteamCisco Restaurant + Bar
SQL Join with AggregationMedium
Practice
Practice drill

Join projects to filtered work logs and aggregate approved billable hours for qualifying active Alten delivery projects.

JoinsGroup ByAggregationsAlten Delivery Centre SpainCensysHCA Healthcare
SQL, Python, and Excel ProjectsMedium
Practice
Practice drill

Aggregate campaign performance with joins, calculated rates, ROI, and null-safe marketing metrics.

data preparationsqlExcelIpsos

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3
Behavioral & Leadership8 questions · ~64 min
Managing Expectations on a Weak ModelMedium

Tests stakeholder management when financial analysis creates friction, especially around communicating bad news, influencing decisions, and preserving trust.

Stakeholder Managementexpectation managementFinancial ModelingIpsos
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The finish line: interview-readyComplete all 20 questions plus 3 hands-on drills to finish this plan.