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Nielsen Software Engineer Interview Questions

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

50questions
~7htotal time
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1
CodingStart here. 15 questions · ~126 min
Merge Two Sorted ArraysEasy
Practice

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

ArraysSortingTwo PointersNielsen
Discuss Complexity of Two SumEasy
Recently asked

Explain the time and space complexity of solving Two Sum with a hash table versus brute force.

ArraysSearchingSortingNielsen
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2
SQL & Data Manipulation10 questions + 3 drills · ~114 min
Understanding ACID Properties in DatabasesMedium

Explain the ACID properties of database transactions and their importance.

Nielsen
Strictly Increasing Prices QueryHard
Practice
Practice drill

Use LAG and aggregation to find Nielsen products whose observed monthly prices strictly increase.

sqlAggregationsNielsen
Average Session Time by UserMedium
Practice
Recently asked
Practice drill

Calculate average Nielsen Digital Content Ratings session duration per user using a CTE, interval arithmetic, aggregation, and a LEFT JOIN.

sql queryData AnalysisNielsenThe Nielsen
SQL Bookstore Schema PracticeEasy
Practice
Practice drill

Use a CTE, joins, and distinct aggregates to calculate Meta Logistics bookstore payment metrics.

sql queriessqlpythonMeta Logistics
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3
Pipelines4 questions · ~34 min
Scaling Data Pipelines EffectivelyMedium
Recently asked

Approach for building data pipelines that scale in throughput, reliability, and operational visibility.

InfrastructureETLNielsen
Consistency in Distributed SystemsHard
Recently asked

Evaluates your understanding of distributed consistency models and integrity mechanisms.

distributed systemsconsistencydata integrityNielsen
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4
System Design15 questions · ~126 min
Optimizing a Slow Production QueryHard
Recently asked

Tests your ability to diagnose and optimize slow database queries under production constraints.

productionNielsen
Refactoring MicroservicesHard
Recently asked

Evaluates your approach to designing maintainable microservices with operational and reliability concerns.

refactoringarchitecturemicroservicesNielsen
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5
Behavioral & Leadership4 questions · ~34 min
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6
More topics2 questions · ~17 min
OSI Model ArchitectureMedium

Evaluates understanding of OSI layers and troubleshooting mindset.

NetworkingOperating SystemsarchitectureNielsen
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The finish line: interview-readyComplete all 50 questions plus 3 hands-on drills to finish this plan.