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Stonex Group Data Engineer Interview Questions

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

21questions
~3htotal time
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1
SQL & Data ManipulationStart here. 9 questions + 3 drills · ~105 min
Window Ranking in Ticket QueuesMedium

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

Window FunctionsRankingrow_numberStonex Group
Optimizing Slow SQL QueriesHard

Tests your ability to diagnose and optimize complex SQL performance on large datasets.

Joinsperformancequery optimizationStonex Group
Finding Duplicates with Self-JoinsMedium

Assesses your SQL skills for detecting duplicates efficiently using self-joins.

sql queryStonex Group
Advanced SQL With PartitionsHard
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Practice drill

Use CTEs, aggregations, and window functions to compare gender pay and find each department's second-highest salary.

Window FunctionsJoinssqlMeesho
Average Vehicle Idle Time by ZoneHard
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Practice drill

Use joins, a CTE, and aggregations to calculate average vehicle idle minutes in a specific geographic zone.

JoinsData ManipulationsqlWaymo
SQL Bookstore Schema PracticeEasy
Practice
Practice drill

Use a CTE, joins, and distinct aggregates to calculate Meta Logistics bookstore payment metrics.

sql queriessqlpythonMeta Logistics
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2
Coding4 questions · ~33 min
OOPs and DSA FundamentalsMedium

Assesses foundational coding concepts and ability to reflect on project design.

Data StructuresoopStonex Group
Pair Arrangement Under ConditionsMedium

Evaluates algorithmic thinking for constraint-based pair arrangement.

coding challengeProblem SolvingStonex Group
Merge Sort and Core Data StructuresHard

Tests fundamentals of algorithms and data structures implementation.

Data StructuressqlStonex Group
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3
Behavioral & Leadership6 questions · ~50 min
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4
More topics2 questions · ~17 min
SDLC for Data FeaturesMedium

Assesses your approach to delivering reliable data features through planning, implementation, and validation.

sdlcStonex Group
Real-Time Market Data PipelineHard

Evaluates your design choices for low-latency, reliable ingestion of real-time market data at Stonex Group.

data pipelinearchitecturereal-time dataStonex Group

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