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Updated weekly · Last refresh Aug 30

ProSidian Data Scientist Interview Questions

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

21questions
~3htotal time
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1
SQL & Data ManipulationStart here. 3 questions + 3 drills · ~54 min
Handling Missing and Skewed DataMedium

Explain how to handle NULLs, skewed values, and outliers when preparing an analysis dataset using SQL.

Data Qualitynull handlingData WranglingProSidian
SQL or Python Data CleaningMedium

Tests practical data wrangling skills and how you deliver analysis for executives.

data cleaningsqlProSidian
SQL Data Quality ChecksHard
Practice
Practice drill

Detect missing fields, duplicate transaction keys, invalid amounts, and merchant reference issues with PostgreSQL CTEs and joins.

Data Qualitynull handlingdata integritySigmoid
Top Users by Recent Transaction VolumeMedium
Practice
Practice drill

Find the top 3 users by completed transaction volume in the last 30 days using joins and aggregation.

Data Analysisquery optimizationsqlTTier 1 BankRevolutChime
Clean Null Campaign MetricsEasy
Practice
Practice drill

Use CASE and COALESCE to standardize missing StackAdapt campaign metrics and count incomplete rows by campaign.

null handlingData WranglingReconciliationStackadaptCvent
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2
Machine Learning4 questions · ~32 min
NLP Sentiment Pipeline DesignMedium

Tests your approach to building NLP pipelines for HR feedback and stakeholder-ready outputs.

pipeline designNLPSentiment AnalysisProSidian
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3
Behavioral & Leadership8 questions · ~64 min
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4
More topics6 questions · ~48 min
Common Pitfalls in Experiment ResultsHard

Identify the main pitfalls that can distort A/B test interpretation and explain how to guard against them.

PeekingNovelty EffectSample Ratio MismatchProSidian
Predictive Model Performance MetricsMedium

Tests your knowledge of model evaluation metrics aligned to workforce planning outcomes.

predictive modelingperformance metricsProSidian
Diagnosing Drops in Workforce MetricsMedium

Tests your troubleshooting mindset and ability to isolate causes of metric regressions.

Data AnalysisProSidian
Product Metrics for HR TechMedium

Tests your ability to define measurable product outcomes and connect them to business goals.

product metricsProSidian
Workforce Survey Significance TestingMedium

Tests your ability to choose appropriate hypothesis tests for workforce survey results.

Statistical SignificancevalidationProSidian
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The finish line: interview-readyComplete all 21 questions plus 3 hands-on drills to finish this plan.