Dataford
Top 19
Prep plan
Updated weekly · Last refresh Sep 22
A

AI research lab Data Scientist Interview Questions

The questions to prepare for a AI research lab Data Scientist interview. Questions from real interview reports rank first. Updated daily.

19questions
~3htotal time
Track your progressSign up free to work through all 19 questions and resume where you left off.
Start practicing free →
1
Product SenseStart here. 4 questions · ~32 min
Define Metrics for New FeaturesMedium

Define a success metric for a new feature that captures real user value, not just raw usage.

MetricsFeature Prioritizationuser valueAAI research lab
Define Success for ExperimentsMedium

Assesses experimental goal-setting and measurable outcomes.

AAI research lab
More Product Sense questions with a free account
2
A/B Testing & Experimentation5 questions · ~40 min
Common Pitfalls in Experiment ResultsHard

Identify the main pitfalls that can distort A/B test interpretation and explain how to guard against them.

PeekingNovelty EffectSample Ratio MismatchAAI research lab
More A/B Testing & Experimentation questions with a free account
3
Behavioral & Leadership4 questions · ~32 min
More Behavioral & Leadership questions with a free account
4
More topics6 questions · ~48 min
Optimize Large PostgreSQL Query PerformanceMedium

Explain how to tune slow PostgreSQL queries on multi-million-row tables using indexes, execution plans, joins, and partitioning.

Performance Tuningquery optimizationsqlAAI research lab
First Checks for Metric DropsEasy

Outline the first checks to diagnose a sudden drop in a core product metric, starting with data quality, scope, and decomposition.

Lagging IndicatorsLeading IndicatorsDiagnosisAAI research lab
Confusion Matrix and AccuracyMedium

Evaluates classification metric computation from model outputs.

Confusion MatrixAccuracyModel EvaluationAAI research lab
Define Statistical SignificanceEasy

Tests your understanding of hypothesis testing and p-values.

Hypothesis TestingData AnalysisStatistical SignificanceAAI research lab
Diagnose a Metric Drop After LaunchMedium

Investigate why a key KPI moved the wrong way after a product change and separate signal from noise.

Lagging IndicatorsLeading IndicatorsDiagnosisAAI research lab
More questions with a free account

Sign up to see every question

Create a free account to unlock this list and practice real interview questions.

Get my prep plan
Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
Optimizing Slow SQL QueriesHard
Practice
Practice drill

Optimize a PostgreSQL transaction query that filters, aggregates, ranks, and returns top merchants efficiently on large tables.

Performance Tuningdatabase optimizationlarge datasetsSprinter HealthSentiLinkAutodesk
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 BankCCash AppChime
Identify Funnel Bottlenecks in OnboardingHard
Practice
Practice drill

Use joins, CTEs, and aggregations to find the weakest step in an onboarding funnel and estimate lost conversions.

Funnel AnalysissqlDiagnosisAtlassianRevolut
The finish line: interview-readyComplete all 19 questions plus 3 hands-on drills to finish this plan.