Top 47
Prep plan
Updated weekly · Last refresh Aug 30

Western Digital Data Engineer Interview Questions

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

47questions
~7htotal time
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1
CodingStart here. 9 questions · ~81 min
Merge Two Sorted Linked ListsEasy
Practice

Merge two sorted singly linked lists into one sorted list by relinking existing nodes.

RecursionLinked ListsSortingWestern Digital
Big O Notation ExamplesEasy

Tests algorithmic complexity reasoning and ability to reason about performance.

MathArraysSortingWestern Digital
Digital Logic and Verilog KnowledgeHard

Tests depth of knowledge in digital design concepts and how they relate to engineering workflows.

RecursionBit ManipulationMathWestern Digital
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2
SQL & Data Manipulation9 questions + 1 drill · ~91 min
Finding Duplicate RecordsEasy
Practice

Find duplicate customer emails using GROUP BY and HAVING in PostgreSQL.

Group ByHavingAggregationsWestern Digital
SQL Duplicate DetectionEasy
Practice

Find duplicate customer profiles by grouping on identifying fields and returning only repeated records.

Group ByHavingAggregationsWestern Digital
Top Products by Sales RevenueEasy
Practice
Practice drill

Find the top 10 products by total sales revenue using joins, aggregation, and a CTE.

RankingGroup ByAggregationsRTXiSmile TechnologiesCatalina
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3
Pipelines14 questions · ~125 min
Handling Missing Data in PipelinesMedium

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

InfrastructureETLBatch ProcessingWestern Digital
Real-Time Dashboard Pipeline DesignHard

Approach for building near-real-time dashboard pipelines with streaming, orchestration, and data quality controls.

Stream ProcessingSchedulingDependenciesWestern Digital
Data Quality in ETL PipelinesEasy

Approach for maintaining data quality and integrity across ETL pipelines.

IdempotencyData ModelingQualityWestern Digital
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4
Behavioral & Leadership15 questions · ~134 min
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The finish line: interview-readyComplete all 47 questions plus 1 hands-on drill to finish this plan.