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Updated weekly · Last refresh Oct 17

Nones Software Engineer Interview Questions

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

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
Pipelines3 questions · ~26 min
Asynchronous Node.js ConcurrencyMedium

Tests understanding of asynchronous programming and concurrency in Node.js for I/O-heavy systems.

InfrastructureAPIsAutomationNones
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3
Technical Fundamentals4 questions · ~35 min
OSI Model LayersEasy

Tests foundational networking knowledge relevant to Nones backend and API systems.

backgroundCommunicationtechnical experienceNones
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4
Execution3 questions · ~26 min
Chat App Storage EstimateHard

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

Trade-offsRisk AssessmentScope ManagementNones
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5
Behavioral & Leadership29 questions · ~254 min
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6
More topics3 questions · ~26 min
Networking Hardware Between SwitchesMedium

Evaluates practical networking knowledge about inter-switch connectivity.

HardwareNetworkingNones
Optimize Database QueriesMedium

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

SubqueriesJoinsperformanceNones
Network Sustainment ConceptsMedium

Assesses your exposure to MPLS and infrastructure concepts for network sustainment.

NetworkingNones

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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
Automate with Your Programming LanguageMedium
Practice
Practice drill

Count Citi workflow task types with more than one exception and show the latest review date.

Data ManipulationAutomationtechnical experienceCiti
Troubleshooting Data Integration IssuesMedium
Practice
Practice drill

Reconcile records from two systems and classify missing records, amount differences, and status discrepancies.

data integrationnull handlingJoinsAutodesk
Refactoring a Slow QueryMedium
Practice
Practice drill

Refactor a slow Candid Health claims query using pre-aggregation, latest-event logic, and monthly payer metrics.

Performance Tuningdatabase optimizationCTEsCandid Health
The finish line: interview-readyComplete all 50 questions plus 3 hands-on drills to finish this plan.