Top 43
Prep plan
Updated weekly · Last refresh Aug 30

One Software Engineer Interview Questions

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

43questions
~6htotal time
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1
CodingStart here. 18 questions · ~154 min
Kth Largest ElementEasy
Practice

Find the kth largest value in an unsorted array using a selection algorithm or heap.

ArraysSortingHeapOne
Refactor React Class to HooksMedium
Recently asked

Tests frontend refactoring skills and understanding of React hooks and performance considerations.

javascriptfunctionsFrameworksOne
Machine Coding With Unit TestsMedium
Recently asked

Tests ability to deliver correct, testable code for a defined feature under interview constraints.

functionsTestingFrameworksOne
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2
Pipelines5 questions · ~43 min
Offline-First Banking State ModelingMedium
Recently asked

Tests understanding of offline-first state, persistence, and sync considerations for mobile banking.

InfrastructureData ModelingQualityOne
Rate Limiting and Fraud MiddlewareHard
Recently asked

Tests system design for protecting APIs and detecting fraud while maintaining partner integration reliability.

InfrastructureAPIsSecurityOne
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3
System Design4 questions · ~34 min
Distributed Ledger for Double-Spend PreventionHard
Recently asked

Tests advanced system design for ledger consistency, throughput, and fraud prevention against double-spends.

ML RankingFeature StoreRecommendation SystemsOne
LLD for Banking AppHard

Assesses object modeling, responsibilities, and extensible design for a banking app system.

One
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4
Behavioral & Leadership15 questions · ~129 min
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5
More topics1 question · ~9 min
Handle Tech Debt vs FeaturesMedium

Assesses prioritization and decision-making tradeoffs between reliability improvements and new features.

One
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