Top 12
Prep plan
Updated weekly · Last refresh Nov 6
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Index Exchange Data Scientist Interview Questions

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

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1
A/B Testing & ExperimentationStart here. 4 questions · ~40 min
Frequentist vs Bayesian for Long ExperimentsHard

Choose between frequentist and Bayesian inference for a long-running experiment while defining MDEs, guardrails, stopping rules, and ship criteria.

experiment designPeekingGuardrail MetricsIIndex Exchange
Communicating A/B Results to StakeholdersMedium

Explain an A/B test to a non-technical Bunge Limited stakeholder using effect size, uncertainty, business impact, and guardrails.

MDEStakeholder ManagementCommunicationIIndex Exchange
Sample Size for Statistical SignificanceHard

Calculate the sample size needed for statistical significance using baseline rate, MDE, alpha, power, and experiment constraints.

experiment designMDEStatistical SignificanceIIndex Exchange
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2
Behavioral & Leadership3 questions · ~30 min
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3
More topics5 questions · ~50 min
7-Day Rolling Revenue with Window FunctionsMedium
Practice

Calculate each customer's seven-day rolling average of daily revenue using PostgreSQL window functions.

Window FunctionsDate Functionscomplex queriesIIndex Exchange
Balance Short-Term and Long-Term ValueHard

Explain how to optimize near-term product outcomes without sacrificing long-term user trust, retention, and value.

product metricsTrade-offsFeature PrioritizationIIndex Exchange
Cleaning Missing Values in PipelinesEasy

Approach for handling missing values in a pipeline with data quality checks and repeatable transformations.

Data WranglingETLQualityIIndex Exchange
Define Success Metrics for FeaturesMedium

Set a clear north star, supporting KPIs, leading indicators, and guardrails for a new product feature.

North Star MetricLagging IndicatorsKPIsIIndex Exchange
Optimize Slow Queries on Large DataMedium
Practice

Optimize a slow PostgreSQL query on a large dataset by choosing better filters, joins, and indexes.

Performance Tuningdatabase optimizationdatabase managementIIndex Exchange

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Hands-on SQL practiceWrite and run real queries in the editor. 1 drill · ~10 min
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