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Updated weekly · Last refresh Sep 22
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CoffeeBeans Consulting Data Engineer Interview Questions

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

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1
System DesignStart here. 3 questions · ~30 min
Latency vs Consistency Trade-offsHard
Recently asked

Assesses judgment in distributed system design and consistency models.

system designlatencyconsistencyCCoffeeBeans Consulting
Design a Real-Time Streaming PlatformHard
Recently asked

Tests your ability to architect a scalable streaming solution for real-time data processing.

real-time datadesign decisionsCCoffeeBeans Consulting
Ambiguity in System DesignHard
Recently asked

Evaluates adaptability and problem-framing in uncertain project scopes.

system designrequirementsCCoffeeBeans Consulting
2
More topics3 questions · ~30 min
Second and Nth Highest ValuesMedium
Practice
Recently asked

Find the second highest distinct salary and adapt the query to retrieve any requested salary rank.

Data Manipulationsqldatabase queryingCCoffeeBeans Consulting
Caching in Data PipelinesMedium
Recently asked

Tests understanding of where caching helps in pipelines and how to implement it effectively.

data pipelineperformance optimizationcachingCCoffeeBeans Consulting
File Formats in Data EngineeringMedium
Recently asked

Assesses knowledge of common data formats, storage tradeoffs, and interoperability.

parquetdata storageCCoffeeBeans Consulting

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Hands-on SQL practiceWrite and run real queries in the editor. 2 drills · ~20 min
Nth Salary SQLMedium
Practice
Practice drill

Use ranking to return the nth distinct salary from an employee table.

system designnull handlingsqlBBirdeyeAkamai
SQL: Prime and 3rd Highest SalaryMedium
Practice
Practice drill

Identify prime values and employees earning the third highest distinct salary using PostgreSQL CTEs and ranking.

Data Manipulationsqldatabase queryingAnonymous
The finish line: interview-readyComplete all 6 questions plus 2 hands-on drills to finish this plan.