Top 47
Prep plan
Updated weekly · Last refresh Aug 30

Vanguard Data Analyst Interview Questions

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

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1
SQL & Data ManipulationStart here. 13 questions + 1 drill · ~122 min
Top Clients by Volume per RegionMedium
Practice

Rank clients by last-quarter transaction volume per region using aggregation and window functions.

JoinsData WranglingGroup ByVanguard
Customers With No Recent OrdersMedium
Practice

Use a LEFT JOIN and conditional aggregation to find Vanguard customers without orders in the past six months.

SubqueriesJoinsData WranglingVanguard
Trade Within 24 HoursMedium
Practice
Practice drill

Use CTEs, joins, and timestamp conditions to calculate Vanguard users who trade within 24 hours of login.

Date FunctionsJoinsAggregationsVanguard
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2
Statistics & Probability5 questions · ~43 min
Sample Size for Checkout A/B TestMedium

Compute per-variant sample size and runtime to detect a 0.6pp checkout conversion lift with 80% power at α=0.05.

Statistical SignificanceSample SizeVanguard
Designing an A/B TestMedium

Tests experimental design, metrics selection, and controlling bias when evaluating changes.

ExperimentationHypothesis TestingA/B TestingVanguard
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3
Metrics7 questions · ~60 min
Visualizing Churn by AgeMedium

Tests data visualization choices for time trends and segmentation to support retention decisions.

User NeedsKPIEngagement MetricsVanguard
Walk Through a DashboardMedium

Tests communication of analytical impact, audience alignment, and dashboard storytelling.

User NeedsKPIEngagement MetricsVanguard
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4
Behavioral & Leadership20 questions · ~172 min
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5
More topics2 questions · ~17 min
Prioritize Features for AI ProductsMedium

A framework for prioritizing AI product features based on user value, feasibility, evaluation quality, and trade-offs.

Feature PrioritizationValue PropositionVanguard
Design Test for New FeatureMedium

Design an A/B test for a new platform feature, including success metrics, power, guardrails, and a clear ship decision.

experiment designfeature evaluationA/B TestingVanguard

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