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Updated weekly · Last refresh Aug 30

NeenOpal Software Engineer Interview Questions

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

43questions
~9htotal time
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1
CodingStart here. 15 questions · ~181 min
Unique Pairs Sum to TargetEasy
Practice

Find all unique value pairs summing to a target with a hash set in expected O(n) time.

Hash TablesArraysTwo PointersNeenOpal
Two Sum with TargetEasy
Practice

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

Hash TablesArraysStringsNeenOpal
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2
SQL & Data Manipulation4 questions · ~48 min
Running Total Sales by DateMedium
Practice

Aggregate posted Arcesium portfolio sales by date, then calculate each active portfolio's cumulative sales with a window function.

Window FunctionsRunning TotalsNeenOpal
Top Products by Sales RevenueEasy
Practice

Find the top 10 products by total sales revenue using joins, aggregation, and a CTE.

RankingGroup ByAggregationsNeenOpal
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3
Execution10 questions · ~120 min
Choose Monolith or MicroservicesMedium

Evaluate the execution trade-offs between monoliths and microservices and explain how you would choose the right approach.

Trade-offsRisk AssessmentScope ManagementNeenOpal
Managing Critical Cross-Team DependencyMedium

Explain how you would manage a project at risk due to a slipping dependency owned by another team.

Risk AssessmentDependenciesScope ManagementNeenOpal
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4
System Design3 questions · ~36 min
Design a Personalized Recommendation RankerHard

Design a personalized recommendation system that turns user preferences into ranked suggestions with retrieval, ranking, and feedback loops.

RetrievalTwo-Tower ModelsRecommendation SystemsNeenOpal
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5
Pipelines4 questions · ~48 min
Backfilling Missing Pipeline DataMedium

Approach for safely backfilling missing data while preserving correctness, idempotency, and data quality.

ETLQualityNeenOpal
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6
Behavioral & Leadership7 questions · ~84 min
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