Top 28
Prep plan
Updated weekly · Last refresh Aug 30

Ipsos Software Engineer Interview Questions

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

28questions
~4htotal time
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1
CodingStart here. 5 questions · ~47 min
Two Sum with TargetEasy
Practice

Use a hash map to find two array elements that sum to a target in O(n) time.

Hash TablesArraysStringsIpsos
Optimizing Sorting for Large DatasetsMedium

Explain how to choose and optimize sorting approaches for large datasets based on memory, data distribution, and stability requirements.

ArraysSortingGreedyIpsos
Encapsulation and PolymorphismMedium

Tests object-oriented design skills and ability to model behavior with polymorphism.

javaabstractionoopIpsos
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2
SQL & Data Manipulation3 questions + 2 drills · ~48 min
Second Highest Without AggregatesHard
Practice

Find the second highest salary in each department without using aggregate functions.

SubqueriesRankingSelf-JoinsIpsos
Normalization vs Reporting DenormalizationMedium

Explain normalization for data integrity and when denormalization is useful for faster reporting and simpler analytical queries.

performancenormalizationdata integrityIpsos
Database Index Trade-OffsMedium

Tests understanding of indexing mechanics and performance impacts on writes and storage.

Performance TuningindexessqlIpsos
Second Highest Trader SalaryEasy
Practice
Practice drill

Find the second highest distinct salary from a single table using basic PostgreSQL ordering and limiting.

SubqueriesRankingSortingeClinicalWorksInformaticaSpectraforce Technologies
Rank Top Service CategoriesEasy
Practice
Practice drill

Use RANK() and grouped revenue to find ServiceTitan's top three service categories in each region.

RankingperformancesqlServiceTitan

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3
Behavioral & Leadership18 questions · ~168 min
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4
More topics2 questions · ~19 min
Constraint-Based Resource AllocationMedium

Tests ability to reason through constrained optimization and produce a correct solution.

Decision MakingResource Allocationquantitative problem solvingIpsos
Your Previous ExperienceEasy

Tests your relevant background for the Research Analyst responsibilities at Dun & Bradstreet.

Risk AssessmentScope ManagementIpsos
The finish line: interview-readyComplete all 28 questions plus 2 hands-on drills to finish this plan.