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Updated weekly · Last refresh Aug 30

Dunkin' Software Engineer Interview Questions

The questions to prepare for a Dunkin' Software Engineer interview. Questions from real interview reports rank first. Updated weekly.

26questions
~4htotal time
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1
ExecutionStart here. 12 questions · ~99 min
Handling a Difficult StakeholderEasy

Describe how you handled a difficult stakeholder while keeping execution on track and preserving alignment.

Trade-offsRisk AssessmentScope ManagementDunkin'
Balance Speed, Quality, and ScopeMedium

Describe how you handled a tough trade-off between shipping fast, maintaining quality, and reducing scope.

Trade-offsRisk AssessmentScope ManagementDunkin'
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2
Pipelines8 questions · ~66 min
Design for Morning Traffic SpikesHard

Tests system design for high availability, scalability, and performance under extreme demand.

InfrastructureSchedulingDependenciesDunkin'
Deploy and Manage in AWS or AzureMedium

Tests cloud deployment practices, operations, and service lifecycle management.

InfrastructureToolsOrchestrationDunkin'
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3
Coding3 questions · ~25 min
Modernize Legacy Code for PerformanceMedium

Tests refactoring strategy, performance thinking, and risk management when improving existing systems.

Hash TablesArraysSortingDunkin'
Clean Code for Ordering PlatformsMedium

Tests software engineering fundamentals for the end-to-end ordering stack and integration reliability.

Hash TablesArraysSortingDunkin'
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4
More topics3 questions · ~25 min
Optimize Slow Queries at PeakMedium

Tests SQL performance troubleshooting and practical tuning under production constraints.

Joinsquery optimizationAggregationsDunkin'
Relational and NoSQL for TransactionsHard

Tests data modeling choices and throughput-focused database architecture.

JoinsData WranglingAggregationsDunkin'
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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 26 questions plus 3 hands-on drills to finish this plan.