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1010data Interview Questions

The questions to prepare for 1010data interviews, across all roles. Questions from real interview reports rank first. Updated weekly.

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1
CodingStart here. 5 questions · ~50 min
Palindrome FunctionEasy
Practice

Use two pointers to determine whether a City National Bank reference label reads identically forward and backward.

RecursionStringsTwo Pointers1010data
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2
SQL & Data Manipulation4 questions + 2 drills · ~60 min
Top Products by Sales RevenueEasy
Practice

Find the top 10 products by total sales revenue using joins, aggregation, and a CTE.

RankingGroup ByAggregations1010data
Monthly Sales Trends by CategoryMedium
Practice
Practice drill

Aggregate monthly sales by product category and use LAG to calculate month-over-month changes.

InfrastructureToolsData WranglingTotal Wine & MoreInc.Benjamin Moore
Contact Center Agent Performance MetricsHard
Practice
Practice drill

Compute daily agent call KPIs and SLA using joins, aggregations, and window ranking in a contact center model.

ETLAggregationsData ModelingADP
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3
Pipelines4 questions · ~40 min
Data Quality in ETL PipelinesEasy

Approach for maintaining data quality and integrity across ETL pipelines.

IdempotencyData ModelingQuality1010data
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4
Machine Learning4 questions · ~40 min
Supervised vs Unsupervised LearningEasy

Explain how supervised and unsupervised learning differ, and ground the distinction in a practical ML example.

Unsupervised LearningFeature EngineeringBias-Variance Tradeoff1010data
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5
Execution4 questions · ~40 min
Recover a Slipping ProjectMedium

Explain how you would diagnose and recover a project that is falling behind schedule without losing stakeholder trust.

Success CriteriaRoadmappingRisk Assessment1010data
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6
Metrics4 questions · ~40 min
Define Success for a ProjectEasy

Define what success means for a project using clear KPIs, a north star, and supporting metrics.

KPIsSuccess CriteriaDiagnosis1010data
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7
More topics25 questions · ~251 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 Mismatch1010data
Sizing an Untapped Product MarketHard

Framework for estimating TAM, adoption, and revenue for a new product launch in an untapped market.

revenue modelnew product launchMarket Sizing1010data
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The finish line: interview-readyComplete all 50 questions plus 2 hands-on drills to finish this plan.