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Nones Software Engineer Interview Questions

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

50questions
~7htotal time
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1
CodingStart here. 8 questions · ~70 min
Detect Cycle in Linked ListEasy
Practice

Use Floyd’s two-pointer algorithm to determine whether a singly linked list contains a cycle.

Hash TablesLinked ListsTwo PointersNones
Maximum Sum Contiguous SubarrayEasy
Practice

Use Kadane's algorithm to find the contiguous subarray with the largest sum in linear time.

Dynamic ProgrammingArraysGreedyNones
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2
Execution4 questions · ~35 min
Chat App Storage EstimateHard

Tests capacity planning reasoning and ability to translate product usage into storage estimates.

Trade-offsRisk AssessmentScope ManagementNones
Passenger Car EstimationHard

Tests structured estimation and reasoning under ambiguity for real-world scaling questions.

RoadmappingRisk AssessmentScope ManagementNones
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3
Pipelines3 questions · ~26 min
Rate Limiting vs ThrottlingMedium

Tests API protection strategies and practical implementation knowledge for Nones services.

InfrastructureAPIsQualityNones
Centralized Logging and Error HandlingMedium

Tests your ability to design maintainable backend observability and failure handling at Nones.

InfrastructureAPIsQualityNones
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4
Behavioral & Leadership32 questions · ~280 min
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5
More topics3 questions · ~26 min
Optimize Database QueriesMedium

Tests performance engineering skills for data access in Nones backend systems.

SubqueriesJoinsperformanceNones
Networking Hardware Between SwitchesMedium

Evaluates practical networking knowledge about inter-switch connectivity.

HardwareNetworkingNones
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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
Monthly Sales Trends by CategoryMedium
Practice
Practice drill

Aggregate monthly sales by product category and use LAG to calculate month-over-month changes.

InfrastructureToolsData WranglingTotal Wine & MoreInc.Benjamin Moore
Resolve Conflicting Customer AttributesMedium
Practice
Practice drill

Use joins, CTEs, and row ranking to resolve conflicting customer profile values across ACME House systems.

JoinsData WranglingQualityRamsey SolutionsACME House
Reconcile Conflicting Invoice TotalsMedium
Practice
Practice drill

Reconcile billing and ERP invoice totals using joins, a CTE for latest snapshots, and CASE-based discrepancy classification.

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