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Dun & Bradstreet Software Engineer Interview Questions

The questions to prepare for a Dun & Bradstreet Software Engineer interview. Questions from real interview reports rank first. Updated weekly.

50questions
~7htotal time
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1
CodingStart here. 25 questions · ~212 min
Implement a Sorting AlgorithmMedium
Practice

Implement stable merge sort to order Dell PowerStore events by timestamp and descending severity.

RecursionArraysSortingDun & Bradstreet
REST vs SOAP Web ServicesEasy

Compare REST and SOAP web services across architecture style, message format, transport, and common tradeoffs.

ArraysStringsDun & Bradstreet
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2
Execution3 questions · ~25 min
Migrate Monolith to MicroservicesHard

Plan a zero-downtime migration from a legacy monolith to microservices while managing risk, sequencing, and stakeholder pressure.

Trade-offsRoadmappingRisk AssessmentDun & Bradstreet
Design an E-Commerce Clone SystemHard

Tests system design judgment across components, data flows, and scalability tradeoffs.

system designarchitectureDun & Bradstreet
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3
SQL & Data Manipulation4 questions + 3 drills · ~64 min
Optimize SQL for Large DatasetsMedium

Tests your query optimization skills for performance and scalability.

Performance TuningqueriessqlDun & Bradstreet
SQL Queries for RankingMedium
Practice
Practice drill

Rank active HSBC employees by division and return every employee tied for the highest or second-highest salary.

javasqlHsbc
SQL Join for Top EarnersEasy
Practice
Practice drill

Use ORDER BY and LIMIT to return Roku's two highest-paid employees.

queriesJoinssqlRoku
SQL Query for Expected ResultsMedium
Practice
Practice drill

Use LEFT JOINs, a CTE, and aggregation to summarize 2025 claims and completed payments for active Guidewire PolicyCenter policies.

databasesqlGGuidewire Software
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4
Security & Infrastructure3 questions · ~25 min
Disk Space for VS 2010Easy

Assesses your ability to reason about system requirements and constraints.

Dun & Bradstreet
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5
Behavioral & Leadership12 questions · ~102 min
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6
More topics3 questions · ~25 min
Cloud Deployment Design ChoicesHard

Tests system design trade-offs between cloud and on-prem deployment constraints.

Dun & Bradstreet
Batch Processing System DesignHard

Assesses your ability to design scalable batch pipelines with reliability and performance considerations.

system designBatch ProcessingDun & Bradstreet
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The finish line: interview-readyComplete all 50 questions plus 3 hands-on drills to finish this plan.