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Updated weekly · Last refresh Aug 30

PayPal Data Analyst Interview Questions

The questions to prepare for a PayPal Data Analyst interview. Questions from real interview reports rank first. Updated weekly.

50questions
~7htotal time
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1
A/B Testing & ExperimentationStart here. 4 questions · ~32 min
Landing Page Conversion Test DesignMedium

Design a landing-page A/B test with clear metrics, power, and significance criteria while guarding against common experiment pitfalls.

Statistical SignificanceSample SizeA/B TestingPayPal
Conversion Lift, AOV Drop TradeoffHard

Assess whether a conversion lift is worth shipping when the same experiment reduces average order value and may hurt net business impact.

ExperimentationGuardrail MetricsA/B TestingPayPal
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2
SQL & Data Manipulation11 questions + 3 drills · ~119 min
Ranking Trial Results with Window FunctionsEasy

Explain how RANK(), DENSE_RANK(), and ROW_NUMBER() differ when ordering tied clinical trial results.

Window FunctionsRankingData WranglingPayPal
Detect Duplicate Accounts and AggregateMedium

Tests entity resolution logic in SQL and correct aggregation across merged accounts.

null handlingJoinsAggregationsPayPal
SQL Missing Marks RuleEasy
Practice
Practice drill

Use GROUP BY and HAVING to exclude students missing marks in two or more subjects.

data cleaningsqlPayPal
SQL Conversion by Channel and DeviceMedium
Practice
Practice drill

Calculate PayPal Checkout conversion rates by acquisition channel and device using a CTE, LEFT JOIN, and conditional aggregation.

JoinsGroup ByAggregationsPayPal
SQL Weekly Cohort RetentionHard
Practice
Practice drill

Calculate weekly PayPal user retention by signup cohort using CTEs, date functions, joins, and aggregation.

Date FunctionsCTEsAggregationsPayPal
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3
Product Sense3 questions · ~24 min
Recommendation Logic for New UsersHard

Tests your ability to design practical recommendation logic under data sparsity at PayPal.

User NeedsProduct VisionPayPal
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4
Metrics6 questions · ~48 min
Estimate US P2P Transactions on SundayHard

Tests estimation methodology, assumptions, and reasoning about transaction volumes for PayPal.

Estimationmarket sharetransaction volumePayPal
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5
Behavioral & Leadership24 questions · ~194 min
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6
More topics2 questions · ~16 min
Understanding Type I and Type II Errors in TestingMedium

Differentiate between Type I and Type II errors in hypothesis testing with a practical example.

Hypothesis TestingStatistical SignificanceP-ValuesPayPal
Statistical Power and Minimum Sample SizeMedium

Tests your statistical understanding of power, effect size, and sample size planning.

Hypothesis TestingPower AnalysisSample SizePayPal

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