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Updated weekly · Last refresh Oct 17

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 daily.

50questions
~7htotal time
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1
CodingStart here. 25 questions · ~220 min
Implement a Sorting AlgorithmMedium
Practice
Recently asked

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

RecursionArraysSortingDun & Bradstreet
REST vs SOAP Web ServicesEasy
Recently asked

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

ArraysStringsDun & Bradstreet
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2
Execution3 questions · ~26 min
Migrate Monolith to MicroservicesHard
Recently asked

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

Trade-offsRoadmappingRisk AssessmentDun & Bradstreet
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3
Security & Infrastructure3 questions · ~26 min
Disk Space for VS 2010Easy
Recently asked

Assesses your ability to reason about system requirements and constraints.

Dun & Bradstreet
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4
SQL & Data Manipulation4 questions + 3 drills · ~65 min
SQL Joins and AggregationsEasy
Recently asked

Assesses practical SQL knowledge for joins, aggregation, and query composition.

JoinssqlDun & Bradstreet
Java Core Concepts and SQL BasicsMedium
Practice
Practice drill

Explain core Java concepts and produce an aggregated SQL access summary using joins.

javaJoinssqlSaviynt
Core Java and Spring MicroservicesMedium
Practice
Practice drill

Return cardholders whose 2025 approved transaction total is at least 1000 across multiple transaction records.

javaJoinssqlMastercard
Unique Elements and Top-K FrequenciesMedium
Practice
Practice drill

Return the first row for each unique value, then rank the k most frequent values.

large datasetsData Structurescomplex queriesEverlaw
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5
Behavioral & Leadership11 questions · ~97 min
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6
More topics4 questions · ~35 min
Cloud Deployment Design ChoicesHard
Recently asked

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

Dun & Bradstreet
Batch Processing System DesignHard
Recently asked

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

system designBatch ProcessingDun & Bradstreet
Prevent N+1 with HibernateMedium
Recently asked

Tests your ability to diagnose and fix inefficient ORM query patterns.

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