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Updated weekly · Last refresh Aug 30

Expedia Group Data Engineer Interview Questions

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

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1
CodingStart here. 4 questions · ~38 min
Check Binary Tree BalanceEasy
Practice

Use postorder recursion to determine whether a binary tree is height-balanced in O(n) time.

RecursionSearchingTreesExpedia Group
Binary Tree Level Order TraversalEasy
Practice

Traverse a binary tree level by level using a queue-based breadth-first search.

QueueTreesExpedia Group
Binary Tree TraversalMedium

Tests your ability to implement standard tree traversal algorithms correctly.

RecursionQueueTreesExpedia Group
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2
Pipelines12 questions · ~115 min
ETL vs ELT Trade-offsEasy

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

ETLELTData ModelingExpedia Group
Optimize Slow Spark ETL PipelineHard

Redesign a slow Databricks Spark ETL pipeline to cut runtime from 3 hours to under 60 minutes without breaking data quality or SLAs.

Expedia Group
Data Quality in ETL PipelinesEasy

Approach for maintaining data quality and integrity across ETL pipelines.

IdempotencyData ModelingQualityExpedia Group
Data Quality and Schema EvolutionMedium

Approach for handling schema changes and data quality checks in a high-volume data lake pipeline.

schema evolutionData ModelingQualityExpedia Group
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3
Behavioral & Leadership7 questions · ~67 min
Influencing Without Formal AuthorityEasy

Tests influence without authority: aligning stakeholders through data, empathy, and ownership to drive a decision and measurable outcome.

Influence Without AuthorityStakeholder ManagementCommunicationExpedia Group
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The finish line: interview-readyComplete all 23 questions to finish this plan.