Top 25
Prep plan
Updated weekly · Last refresh Sep 12

DONE by NONE Data Analyst Interview Questions

The questions to prepare for a DONE by NONE Data Analyst interview. Questions from real interview reports rank first. Updated daily.

25questions
~3htotal time
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1
MetricsStart here. 9 questions · ~75 min
Evaluate Support Workflow Change ImpactMedium

Assess whether a new client support workflow improved true customer outcomes despite better speed metrics and worse reopen rates.

KPIsLeading IndicatorsDiagnosisDONE by NONE
Diagnose Funnel Drop-OffMedium

Analyze where users drop off in a product funnel and identify the biggest conversion leak.

AARRR FrameworkFunnel AnalysisConversion RateDONE by NONE
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2
Product Sense5 questions · ~42 min
Define Launch Success MetricsMedium

Approach for choosing launch success metrics, including a north star, leading indicators, and clear success criteria.

Product-Market FitUser NeedsKPIDONE by NONE
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3
Statistics & Probability3 questions · ~25 min
Sample Size and Power PlanningMedium

Reason about sample size, power, and minimum detectable effect before launching an experiment.

Hypothesis TestingPower AnalysisSample SizeDONE by NONE
A/B Testing for Product FeaturesMedium

Explain how to design and evaluate an A/B test for a product feature, including metrics, MDE, sample size, and guardrails.

Hypothesis TestingStatistical SignificanceA/B TestingDONE by NONE
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4
Pipelines3 questions · ~25 min
Data Quality in ETL PipelinesEasy

Approach for maintaining data quality and integrity across ETL pipelines.

IdempotencyData ModelingQualityDONE by NONE
Automated Dashboards for Product HealthMedium

Tests dashboard automation, metric reliability, and ongoing operational maintenance.

SchedulingETLQualityDONE by NONE
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5
SQL & Data Manipulation5 questions + 3 drills · ~72 min
The finish line: interview-readyComplete all 25 questions plus 3 hands-on drills to finish this plan.