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Basis Technologies Interview Questions

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

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1
SQL & Data ManipulationStart here. 4 questions + 1 drill · ~48 min
2
Coding5 questions · ~48 min
Array Duplicate FinderEasy
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Return the values that appear more than once in an array using a hash set in linear time.

Hash TablesArraysBasis Technologies
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3
Machine Learning4 questions · ~38 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 TradeoffBasis Technologies
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4
Metrics5 questions · ~48 min
Using Metrics to Drive DecisionsEasy

Explain how you used a KPI and supporting metrics to diagnose a product issue and make a concrete product decision.

Funnel AnalysisKPIsLeading IndicatorsBasis Technologies
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5
Execution5 questions · ~48 min
Quality Under Tight DeadlineMedium

Explain how you protect quality on a fixed-deadline engineering project by managing scope, risks, and release criteria.

Launch PlanningTrade-offsScope ManagementBasis Technologies
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6
A/B Testing & Experimentation4 questions · ~38 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 MismatchBasis Technologies
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7
More topics23 questions · ~221 min
Analyze a New Product CategoryHard

Approach for analyzing whether a new product category is worth entering and how to size and frame the opportunity.

Competitive AnalysisGrowth StrategyMarket SizingBasis Technologies
Define Metrics for New FeaturesMedium

Define a success metric for a new feature that captures real user value, not just raw usage.

MetricsFeature Prioritizationuser valueBasis Technologies
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