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The Dna Group Interview Questions

The questions to prepare for The Dna Group interviews, across all roles. Questions from real interview reports rank first. Updated weekly.

50questions
~7htotal time
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1
StrategyStart here. 5 questions · ~40 min
New Territory Plan in Low AwarenessHard

Build a territory plan for a new market by sizing the opportunity, segmenting accounts, shaping coverage, and creating demand despite low brand awareness.

Go-to-MarketGrowth StrategyMarket SizingThe Dna Group
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2
Coding3 questions · ~24 min
Thread-Safe Command Queue for InstrumentsHard

Tests concurrency skills and safe communication patterns for controlling multiple instruments.

Queuethread safetyconcurrencyThe Dna Group
Anomaly Detection in Process LogsMedium

Tests data analysis and engineering judgment for detecting issues in manufacturing timelines.

Arraysanomaly detectionperformance analysisThe Dna Group
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3
Execution4 questions · ~32 min
Real-Time Bioreactor Interface DesignHard

Tests real-time systems thinking and interface design for biotech manufacturing control.

design systemThe Dna Group
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4
System Design3 questions · ~24 min
Designing an Experiment in WorkflowHard

Tests experimental design thinking and practical fit with The Dna Group's nucleic acid product and research processes.

experimental designData AnalysisThe Dna Group
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5
Behavioral & Leadership31 questions · ~249 min
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6
More topics4 questions · ~32 min
Optimize Inventory Query PerformanceMedium

Tests SQL performance tuning and ability to improve query efficiency for operational data.

Performance TuningindexessqlThe Dna Group
Market Segmentation MetricsMedium

Tests analytical thinking and targeting rigor for identifying high-value prospects in life sciences.

KPIsThe Dna Group
Correcting a Model FlawHard

Tests model validation skills and your ability to diagnose and remediate modeling errors.

Data AnalysisProblem Solvingmodel validationThe Dna Group
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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
Top Users by Recent Transaction VolumeMedium
Practice
Practice drill

Find the top 3 users by completed transaction volume in the last 30 days using joins and aggregation.

Data Analysisquery optimizationsqlTTier 1 BankRevolutChime
Top Users by Region QueryMedium
Practice
Practice drill

Rank the top 10 ResMed myAir users in each region using joins, aggregation, and ROW_NUMBER().

Data AnalysissqlResmed
SQL Window Functions Moving AverageMedium
Practice
Practice drill

Calculate a three-day moving average of active-client revenue using aggregation and SQL window functions.

Window FunctionsData AnalysissqlAAreteMITREGlassdoor
The finish line: interview-readyComplete all 50 questions plus 3 hands-on drills to finish this plan.