BT Group Data Engineer Interview Questions

The questions to prepare for a BT Group Data Engineer interview. Questions from real interview reports rank first. Updated daily.

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PipelinesStart here. 5 questions · ~41 min

CI/CD in Data PipelinesEasy

Explain what CI/CD means and why it matters for reliable, repeatable pipeline delivery in DevOps.

InfrastructureOrchestrationQualityBBT Group

ETL vs ELT Trade-offsEasy

Compare ETL and ELT, and explain when ELT is the better pipeline pattern.

ETLELTData ModelingBBT Group

Optimizing a Spark JobMedium

Tests ability to improve Spark performance through tuning and execution planning.

data processingperformance optimizationsparkBBT Group

Kafka in Real-Time StreamingMedium

Evaluates understanding of Kafka responsibilities in streaming data flows.

kafkadata engineeringBBT Group

Ensuring Data ConsistencyMedium

Assesses approaches for maintaining correctness across distributed data systems.

data engineeringdistributed systemsdata consistencyBBT Group

Behavioral & Leadership3 questions · ~25 min

Resolving Team Disagreement on ApproachEasy

Tests conflict resolution in a delivery context, including communication, influence without authority, and ability to preserve team trust while reaching a decision.

Influence Without AuthorityConflict ResolutionCommunicationBBT Group

Explaining a Technical Concept ClearlyEasy

Tests communication, ownership, and stakeholder management when translating technical complexity into actionable business understanding.

Problem SolvingData Structurestechnical fundamentalsBBT Group

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