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Updated weekly · Last refresh Aug 30

University of Wisconsin-Madison Data Engineer Interview Questions

The questions to prepare for a University of Wisconsin-Madison Data Engineer interview. Questions from real interview reports rank first. Updated weekly.

23questions
~3htotal time
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1
SQL & Data ManipulationStart here. 4 questions + 2 drills · ~54 min
Top Customers by Sales RevenueEasy
Practice

Use GROUP BY and SUM to rank the top 10 customers by total revenue from a single sales table.

RankingGroup ByAggregationsUniversity of Wisconsin-Madison
SQL vs NoSQL Trade-offsEasy

Explain SQL vs NoSQL trade-offs, including schema design, consistency, scaling, and query flexibility.

JoinsData WranglingAggregationsUniversity of Wisconsin-Madison
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 WranglingUniversity of Wisconsin-Madison
Budget vs Actual Variance ReportMedium
Practice
Practice drill

Use GROUP BY and CASE to compare total budget vs actual spend and report departments with non-zero variance.

Data WranglingCase WhenAggregationsUniversity of Wisconsin-Madison
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
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2
Pipelines14 questions · ~121 min
Data Quality in ETL PipelinesEasy

Approach for maintaining data quality and integrity across ETL pipelines.

IdempotencyData ModelingQualityUniversity of Wisconsin-Madison
Secure DevOps Data PipelinesMedium

Approach for embedding security controls into data pipeline delivery, orchestration, and operations.

InfrastructureOrchestrationQualityUniversity of Wisconsin-Madison
Data Integration Tools ExperienceEasy

Discuss the data integration tools you have used and how they fit into ETL, orchestration, and data quality workflows.

InfrastructureToolsETLUniversity of Wisconsin-Madison
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3
Coding4 questions · ~34 min
Detecting Anomalies in DataMedium

Tests your ability to build anomaly detection logic and choose appropriate methods.

Hash TablesMathArraysUniversity of Wisconsin-Madison
Explaining Your Coding ApproachEasy

Tests clarity of reasoning and problem-solving approach during coding.

RecursionHash TablesArraysUniversity of Wisconsin-Madison
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4
More topics1 question · ~9 min
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The finish line: interview-readyComplete all 23 questions plus 2 hands-on drills to finish this plan.