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Peregrine Advisors Data Scientist Interview Questions

The questions to prepare for a Peregrine Advisors Data Scientist interview. Questions from real interview reports rank first. Updated daily.

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~3htotal time
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1
A/B Testing & ExperimentationStart here. 4 questions · ~35 min
Avoid Pitfalls in Online ExperimentsHard

Explain common online experimentation pitfalls and how to design, analyze, and decide in ways that avoid false wins.

Network InterferenceNovelty EffectSample Ratio MismatchPPeregrine Advisors
Power Analysis for Survey ExperimentHard

Determine sample size and power for a customer survey or experiment, including MDE, guardrails, and a disciplined decision rule.

MDEPower AnalysisSample SizePPeregrine Advisors
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2
Product Sense3 questions · ~26 min
Balancing Retention and RevenueMedium

Assesses tradeoff thinking between retention and monetization outcomes.

user retentionPPeregrine Advisors
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3
Behavioral & Leadership4 questions · ~35 min
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4
More topics7 questions · ~61 min
SQL Window Functions Rolling AverageMedium
Practice

Calculate three-day rolling average sales by region using aggregation, joins, and PostgreSQL window functions.

Window FunctionssqlPPeregrine Advisors
Measure AI Engagement ImpactMedium

Define how to measure whether an AI feature improves engagement, repeat usage, and downstream product value.

KPIsEngagement MetricsPPeregrine Advisors
Approach to Statistical SignificanceMedium

Assesses experimental rigor and decision-making around statistical significance.

ExperimentationStatistical SignificancePPeregrine Advisors
Ensuring Data ConfidentialityMedium

Evaluates data governance practices for protecting sensitive information.

SecurityPPeregrine Advisors
Diagnosing Conversion Metric DropsMedium

Evaluates structured troubleshooting of conversion regressions using data.

root cause analysisdiagnostic frameworkPPeregrine Advisors
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Hands-on SQL practiceWrite and run real queries in the editor. 2 drills · ~20 min
SQL Window Functions ExperienceMedium
Practice
Practice drill

Use SQL window functions to rank regions by average 2024 yield within each country.

Window FunctionsJoinsData ManipulationKBRMaximus TechQinetiq
Window Functions for TrendsMedium
Practice
Practice drill

Calculate account-level running totals and three-row moving averages with PostgreSQL window functions.

Window FunctionsJoinsData ManipulationGGrupo AstekFFSoft PtyEucloid Data Solutions
The finish line: interview-readyComplete all 18 questions plus 2 hands-on drills to finish this plan.