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The Thaddeus Foundation Interview Questions

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

50questions
~8htotal time
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1
CodingStart here. 4 questions · ~36 min
2
SQL & Data Manipulation8 questions + 2 drills · ~92 min
3
Metrics8 questions · ~72 min
Using Metrics to Drive DecisionsEasy

Explain how you used a KPI and supporting metrics to diagnose a product issue and make a concrete product decision.

Funnel AnalysisKPIsLeading IndicatorsThe Thaddeus Foundation
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4
Execution8 questions · ~72 min
Recover a Slipping ProjectMedium

Explain how you would diagnose and recover a project that is falling behind schedule without losing stakeholder trust.

Success CriteriaRoadmappingRisk AssessmentThe Thaddeus Foundation
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5
A/B Testing & Experimentation4 questions · ~36 min
Pitfalls in Streaming Experiment AnalysisHard

Identify major online experiment pitfalls and explain how they can bias results in a streaming product A/B test.

Network InterferenceNovelty EffectSample Ratio MismatchThe Thaddeus Foundation
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6
Product Sense3 questions · ~27 min
Using Data to Influence DecisionsEasy

Share how you used data to shape a business decision, including the analysis, recommendation, and outcome.

User ResearchUser NeedsValue PropositionThe Thaddeus Foundation
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7
More topics15 questions · ~136 min
Supervised vs Unsupervised LearningEasy

Explain how supervised and unsupervised learning differ, and ground the distinction in a practical ML example.

Unsupervised LearningFeature EngineeringBias-Variance TradeoffThe Thaddeus Foundation
Interpreting P Values in TestingEasy

Explain what a p-value means in hypothesis testing and how it relates to statistical significance.

Hypothesis TestingStatistical SignificanceP-ValuesThe Thaddeus Foundation
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The finish line: interview-readyComplete all 50 questions plus 2 hands-on drills to finish this plan.