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Updated weekly · Last refresh Aug 30

Exscientia Data Engineer Interview Questions

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

25questions
~4htotal time
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1
SQL & Data ManipulationStart here. 4 questions + 2 drills · ~54 min
Second Highest Trader SalaryEasy
Practice

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

SubqueriesRankingSortingExscientia
SQL vs NoSQL for Go-to-Market DataEasy

Explain how SQL and NoSQL differ in schema, consistency, scaling, and Demandbase-style analytics use cases.

JoinsData WranglingExscientia
Improving Slow Query PerformanceMedium

Tests SQL performance tuning, indexing, and query optimization techniques.

Window FunctionsJoinsAggregationsExscientia
Monthly Sales Trends by CategoryMedium
Practice
Practice drill

Aggregate monthly sales by product category and use LAG to calculate month-over-month changes.

InfrastructureToolsData WranglingTotal Wine & MoreInc.Benjamin Moore
Contact Center Agent Performance MetricsHard
Practice
Practice drill

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

ETLAggregationsData ModelingADP
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2
Pipelines19 questions · ~163 min
Cloud Storage in Data PipelinesEasy

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

InfrastructureETLExscientia
Data Quality in ETL PipelinesEasy

Approach for maintaining data quality and integrity across ETL pipelines.

IdempotencyData ModelingQualityExscientia
Data Governance in PipelinesMedium

Describe a practical approach to data governance across shared data pipelines, including quality, ownership, lineage, and controlled data access.

InfrastructureQualityExscientia
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3
More topics2 questions · ~17 min
Automating Python Data CleansingMedium

Tests ability to design maintainable automation for data quality improvements.

ArraysStringsSortingExscientia
Motivation for Data Engineering WorkMedium

Evaluates motivation and fit for Exscientia’s data engineering needs in precision medicine.

motivationExscientia
The finish line: interview-readyComplete all 25 questions plus 2 hands-on drills to finish this plan.