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State of Wisconsin Investment Board (SWIB) Software Engineer Interview Questions

The questions to prepare for a State of Wisconsin Investment Board (SWIB) Software Engineer interview. Questions from real interview reports rank first. Updated weekly.

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1
ExecutionStart here. 5 questions · ~41 min
Explain SDLC and Agile ExperienceEasy

Explain the SDLC and how you’ve applied Agile, Scrum, and sprint-based delivery in practice.

Launch PlanningRoadmappingScope ManagementState of Wisconsin Investment Board (SWIB)
Improve Performance of Slow AppHard

Tests your performance troubleshooting process and ability to drive measurable improvements.

Rollback PlanTrade-offsRisk AssessmentState of Wisconsin Investment Board (SWIB)
Code Quality and MaintainabilityMedium

Tests engineering practices like testing, reviews, standards, and refactoring discipline.

best practicescode qualitymaintainabilityState of Wisconsin Investment Board (SWIB)
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2
Behavioral & Leadership7 questions · ~57 min
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3
More topics5 questions · ~41 min
High-Frequency Trading Data PipelineHard

Tests your system design skills for low-latency, high-throughput data processing.

InfrastructureStream ProcessingData ModelingState of Wisconsin Investment Board (SWIB)
Database Design for Financial AppsMedium

Tests your database modeling, integrity, and performance thinking for financial data.

JoinsData WranglingAggregationsState of Wisconsin Investment Board (SWIB)
Programming Languages and UseEasy

Tests your practical language experience and ability to apply it to real software work.

Hash TablesStringsSortingState of Wisconsin Investment Board (SWIB)
Identify Trends and AnomaliesMedium

Tests your data analysis approach for detecting meaningful signals and outliers.

Window FunctionsRankingAggregationsState of Wisconsin Investment Board (SWIB)
Analyze Time and Space ComplexityMedium

Tests your ability to reason about algorithm efficiency and resource usage.

space complexitytime complexityState of Wisconsin Investment Board (SWIB)

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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
Top Daily Rides by VehicleMedium
Practice
Practice drill

Rank the top 3 completed rides per vehicle per day using joins, a CTE, and ROW_NUMBER.

Window FunctionsJoinsData WranglingWaymo
Deduplicate Out-of-Order Replication EventsMedium
Practice
Practice drill

Use ROW_NUMBER() to keep the earliest created_at 'Repl created' per entity and return out-of-order duplicates to delete.

Window FunctionsSubqueriesJoinsReplitQuantcast
Top Customers by Net SalesMedium
Practice
Practice drill

Compute top 10 customers by net sales using joins and aggregations, ordering by revenue with deterministic tie-breaking.

SubqueriesJoinsData WranglingGain DigitalTCSZest AI
The finish line: interview-readyComplete all 17 questions plus 3 hands-on drills to finish this plan.