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Bca Europe Interview Questions

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

50questions
~7htotal time
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1
SQL & Data ManipulationStart here. 5 questions + 2 drills · ~64 min
2
Coding5 questions · ~44 min
Longest Substring Without RepeatsMedium
Practice

Find the longest substring with all unique characters using a sliding window.

Hash TablesStringsTwo PointersBca Europe
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3
Metrics5 questions · ~44 min
Analyze a Successful CampaignEasy

Describe how you would evaluate a successful marketing campaign using funnel KPIs, conversion, and ROI.

KPIsDiagnosisEngagement MetricsBca Europe
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4
Pipelines4 questions · ~35 min
Data Quality in ETL PipelinesEasy

Approach for maintaining data quality and integrity across ETL pipelines.

IdempotencyData ModelingQualityBca Europe
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5
Machine Learning5 questions · ~44 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 TradeoffBca Europe
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6
Execution5 questions · ~44 min
Balancing Speed Quality and ScopeHard

Describe a time you had to choose between speed, quality, and scope, and how you aligned stakeholders around the trade-off.

Trade-offsRisk AssessmentScope ManagementBca Europe
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7
More topics21 questions · ~184 min
Pitfalls in Streaming Experiment AnalysisHard

Identify major online experiment pitfalls and explain how they can bias results in a streaming product A/B test.

Network InterferenceNovelty EffectSample Ratio MismatchBca Europe
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 SizingBca Europe
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The finish line: interview-readyComplete all 50 questions plus 2 hands-on drills to finish this plan.