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Updated weekly · Last refresh Aug 30

Eightfold Solutions Architect Interview Questions

The questions to prepare for a Eightfold Solutions Architect interview. Questions from real interview reports rank first. Updated weekly.

32questions
~5htotal time
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1
CodingStart here. 5 questions · ~43 min
Merge Two Sorted ArraysEasy
Practice

Merge two sorted arrays into one sorted array using a two-pointer linear scan.

ArraysSortingTwo PointersEightfold
Explaining RecursionEasy

Tests your understanding of recursion and your ability to communicate it clearly.

RecursionStackEightfold
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2
System Design6 questions · ~52 min
Design a Marketplace Recommendations StackMedium

Design a personalized recommendations system for a large e-commerce marketplace with strict latency, freshness, and monitoring needs.

InfrastructureFeature StoreModel ServingEightfold
Design a Resident Recommendations SystemMedium

Design a recommendation and ranking system for a property management platform that personalizes listings and workflow suggestions.

Feature StoreRetrievalModel ServingEightfold
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3
Pipelines4 questions · ~35 min
Diagnose an Integration Pipeline IssueMedium

Structured approach to diagnose failures in an ETL integration, from source extraction through orchestration, data quality, and idempotent recovery.

ToolsDependenciesQualityEightfold
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4
Behavioral & Leadership13 questions · ~113 min
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5
More topics4 questions · ~35 min
Gather Requirements and Write StoriesEasy

Approach for running requirement gathering and turning stakeholder input into clear, prioritized user stories.

User ResearchUser NeedsUse CasesEightfold
Feasibility Assessment StepsMedium

Tests structured solution evaluation, risk identification, and technical feasibility judgment.

EstimationCompetitive AnalysisMarket SizingEightfold
Optimizing Slow SQL QueriesMedium

Tests query tuning skills and understanding of performance bottlenecks.

SubqueriesJoinsAggregationsEightfold
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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
Monthly Sales Trends by CategoryMedium
Practice
Practice drill

Aggregate monthly sales by product category and use LAG to calculate month-over-month changes.

InfrastructureToolsData WranglingTotal Wine & MoreInc.Benjamin Moore
Contact Center Agent Performance MetricsHard
Practice
Practice drill

Compute daily agent call KPIs and SLA using joins, aggregations, and window ranking in a contact center model.

ETLAggregationsData ModelingADP
Resolve Conflicting Customer AttributesMedium
Practice
Practice drill

Use joins, CTEs, and row ranking to resolve conflicting customer profile values across ACME House systems.

JoinsData WranglingQualityRamsey SolutionsACME House
The finish line: interview-readyComplete all 32 questions plus 3 hands-on drills to finish this plan.