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Updated weekly · Last refresh Aug 30

Google Cloud Data Engineer Interview Questions

The questions to prepare for a Google Cloud Data Engineer interview. Questions from real interview reports rank first. Updated weekly.

18questions
~2htotal time
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1
PipelinesStart here. 5 questions · ~41 min
Handling Missing Data in PipelinesMedium

Approach for handling missing data in an ML data pipeline, including validation, imputation, and safe downstream consumption.

InfrastructureETLBatch ProcessingGoogle Cloud
Cloud Pipeline Data SecurityMedium

Key security considerations for a cloud data pipeline, from ingestion through storage, orchestration, and monitoring.

InfrastructureGovernanceETLGoogle Cloud
Consistency and Schema EvolutionHard

Tests your understanding of reliable data modeling, evolution strategies, and consistency tradeoffs.

distributed systemsschema evolutiondata consistencyGoogle Cloud
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2
Behavioral & Leadership9 questions · ~74 min
Handling Architectural Stakeholder ConflictMedium

Tests conflict resolution and influence when a stakeholder challenges an architectural decision with meaningful business or technical stakes.

Conflict ResolutionStakeholder ManagementCommunicationGoogle Cloud
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3
More topics4 questions · ~33 min
BigQuery vs Cloud SQLMedium

Tests your ability to choose the right Google Cloud data platform and reason about performance tradeoffs.

Google Cloud
Caching Data Structure ChoiceMedium

Tests your reasoning about data structures, performance characteristics, and cache behavior.

cachingData StructuresGoogle Cloud
Optimize a Slow BigQuery QueryMedium

Tests your approach to diagnosing bottlenecks and improving query performance on Google Cloud.

Performance Tuningquery optimizationGoogle Cloud
Palindrome Coding ApproachMedium

Assesses your algorithm design and complexity awareness for coding tasks.

AlgorithmsGoogle Cloud

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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
7-Day Rolling Active UsersMedium
Practice
Practice drill

Compute daily active users and a 7-day rolling average using a CTE, distinct counts, and window functions.

Window FunctionsDate FunctionsRunning TotalsMetaSpotifyMeta IT
Top Customers SQL QueryEasy
Practice
Practice drill

Aggregate customer sales volume and return Pyramid Consulting's top 10 customers in descending order.

RankingGroup ByAggregationsPyramid ConsultingBNYCambia Health Solutions
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
The finish line: interview-readyComplete all 18 questions plus 3 hands-on drills to finish this plan.