Quest Global Data Engineer Interview Questions

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

Window Ranking in Ticket Queues

Medium

Explain SQL window functions and when to use ROW_NUMBER() versus DENSE_RANK() for ranked ticket analysis.

Window FunctionsRankingrow_number

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Clustered vs Non-Clustered Indexes

Medium

Explain how clustered and non-clustered indexes differ in storage, lookup behavior, and query performance.

JoinsData Wrangling

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Secure S3 Data for Glue Jobs

Medium

Tests ability to design secure data access patterns for AWS ETL pipelines.

Data QualitySecurityaws

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Spark Memory and Shuffling

Hard

Tests deep understanding of Spark execution, memory management, and shuffle behavior.

performanceshardingspark

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Serverless ETL Pipeline Design

Hard

Tests ability to design scalable serverless ETL workflows on AWS for Quest Global data needs.

ETLOrchestrationaws

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Flatten Nested JSON to CSV

Medium

Tests data transformation skills from semi-structured JSON to structured CSV outputs.

json parsingData Wranglingpython

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