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Software Engineer Interview Questions
Practice 9403 coding, system design and machine learning questions from 546 companies, sorted by role, topic and interview round. Every question has step-by-step hints, a code runner that supports 8 languages and an AI mentor; members also get the full solution walkthrough.
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Showing 3841–3870 of 5874 results
- NutanixHardSoftware EngineerFind the Most Reliable Path Through a Network
Implement an algorithm to find the maximum end-to-end success probability between two nodes in an undirected network with multiplicative edge probabilities. Tests graph traversal, Dijkstra's algorithm variant with max-heaps, and edge-case handling.
Coding & AlgorithmsTechnical ScreenGraphDijkstraHeap - OdeEasySoftware EngineerLive TDD Pairing: Grow a Multiset Class One Test at a Time
A live test-driven pairing exercise where you narrate test cases for a multiset (bag) class one behavior at a time while the interviewer writes the code, judged on test design, incremental thinking, and how you talk through implementation choices.
Software Engineering FundamentalsTechnical Screentddpair-programmingtesting - OdeEasySoftware EngineerTest-Driven Pair Programming: Grow a Java Set Class from Unit Tests
A test-driven pair-programming exercise in which you describe unit tests while the interviewer types, growing a Java set class one operation at a time with the simplest code that makes each test pass. It tests test-case design, incremental refactoring, clear verbal communication and how you would later expand the set.
Software Engineering FundamentalsTechnical Screen - OktaMediumSoftware EngineerBehavioral: How You Use AI, Lead Engineers, and Work with Another Team or PM
A three-part behavioral screen for a software engineer: how you use AI tools in your engineering work, a time you led other engineers on a project, and a project you delivered with another team or a product manager. Tests judgment about AI output, technical leadership, and cross-functional collaboration.
Behavioral & LeadershipTechnical Screen - OktaMediumSoftware EngineerBuild an Auth0-protected MCP server
This question evaluates proficiency in implementing JWT-based authentication and scope-based authorization for an HTTP service, covering token signature and claims validation, JWKS public-key verification, middleware integration, and propagation of identity information.
Software Engineering FundamentalsOnline Assessment - OktaMediumSoftware EngineerDesign a Metrics Storage Platform
This question assesses the ability to architect a scalable time-series database capable of handling high-velocity metric ingestion, efficient long-term storage, and sub-second query performance.
System DesignTechnical ScreenTime SeriesScalabilityData Modeling - OktaMediumSoftware EngineerValidate IPv4 Address List
This problem tests your ability to parse strings and apply conditional logic to validate technical data against specific constraints.
Coding & AlgorithmsTechnical ScreenStringsParsingValidation - OkxMediumSoftware EngineerGroup Strings By Anagram Signature
This problem tests your ability to normalize strings into canonical forms using hashing or frequency counting to identify anagrams efficiently.
Coding & AlgorithmsTechnical ScreenHash MapStringsAnagrams - OmnissaMediumSoftware EngineerAlternate Odd and Even Numbers with Two Threads
This problem tests knowledge of thread synchronization using locks and condition variables to enforce a specific execution order between two concurrent processes.
Coding & AlgorithmsOnsiteConcurrencyMultithreadingSynchronization - OmnissaMediumSoftware EngineerCheck Whether a Singly Linked List Is a Palindrome
Tests the ability to determine if a singly linked list is a palindrome in O(n) time and O(1) auxiliary space using two pointers and in-place list reversal.
Coding & AlgorithmsOnsiteLinked ListTwo PointersIn-Place Reversal - OmnissaMediumSoftware EngineerFind the Celebrity from a Knows Matrix
This problem tests the ability to solve a search problem in O(N) time by utilizing the transitive and exclusionary properties of the 'knows' relationship to eliminate candidates.
Coding & AlgorithmsOnsiteArraysTwo PointersAlgorithms - OmnissaMediumSoftware EngineerFind the Maximum Sum of a Contiguous Subarray
This problem tests the ability to implement Kadane's algorithm to find the maximum sum of a contiguous subarray, specifically focusing on handling negative integers and maintaining optimal time and space complexity.
Coding & AlgorithmsOnsiteArraysDynamic ProgrammingKadane's Algorithm - OmnissaMediumSoftware EngineerPresent a Project Architecture and Your Hardest Technical Decision
This question evaluates your ability to articulate complex system architectures clearly, explain key technical trade-offs, demonstrate personal ownership, and evaluate the long-term impact of architectural decisions.
Behavioral & LeadershipOnsiteSystem ArchitectureTechnical LeadershipTrade-Off Analysis - OmnissaMediumSoftware EngineerPrioritize Two Important Tasks with Competing Deadlines
Assesses how an engineer navigates conflicting priorities, evaluates business versus technical trade-offs, communicates transparently with stakeholders, and executes under tight timelines.
Behavioral & LeadershipOnsiteBehavioralPrioritizationStakeholder Management - OmnissaMediumSoftware EngineerRepeatedly Remove Adjacent Equal Characters
This problem tests your ability to handle recursive reduction patterns in a string using a stack-based approach to achieve linear time complexity.
Coding & AlgorithmsOnsiteStackStringGreedy - OnepayEasySoftware EngineerCount Complete Highway Journeys from Toll Logs
This problem tests string manipulation, hash map usage, and state tracking to identify valid entry-to-exit sequences from an unordered stream of toll logs.
Coding & AlgorithmsTechnical ScreenHash MapsSortingData Streams - OnepayMediumSoftware EngineerDebug and Extend a Device Registry: Status Validation, Active Counts, Bulk Updates
A progressive coding exercise on a device registry: find the bug behind a failing test where a device's status must be allowed for its type, then add validated registration, per-type counts of active devices that omit zeros, and a bulk status update based on maintenance time and failure count. It tests code reading and business logic.
Software Engineering FundamentalsTechnical Screen - OnepayEasySoftware EngineerDesign a Discord-Style Communication Platform
This problem tests your ability to design a scalable real-time messaging architecture, focusing on handling message persistence, state synchronization for offline clients, and channel-based message distribution.
System DesignTechnical ScreenReal-timeScalabilityMessaging - OpenAIMediumSoftware Engineer0-to-1 Ownership, Critical Feedback Both Ways, Defining Success, and Why OpenAI
A software engineer behavioral round covering a 0-to-1 project you built, a time you received negative feedback, how you deliver critical feedback to others, how you define success for a project or product, and why you want to join OpenAI. It tests ownership, self-awareness, communication and motivation.
Behavioral & LeadershipOnsite - OpenAIHardSoftware EngineerA Project You Decided Not to Ship
This question evaluates your product judgment, objective decision-making, and ability to prioritize organizational resources over personal or team output.
Behavioral & LeadershipOnsiteBehavioralLeadershipProduct Judgment - OpenAIMediumSoftware EngineerAI Safety Views and Leadership-Principle Behavioral Questions
A hiring-manager round asks for your view of AI safety and how it would shape your engineering work, followed by standard behavioral questions in the style of Amazon's leadership principles. It tests genuine motivation, judgment when safety and speed conflict, and structured, evidence-based storytelling.
Behavioral & LeadershipOnsite - OpenAIMediumSoftware EngineerAdd Consecutive-Value Bonuses to Grid Paths
Tests dynamic programming on a 2D grid with extended state tracking to incorporate multi-step path history for score bonuses, path counting, and lexicographical path reconstruction.
Coding & AlgorithmsOnsitedynamic-programminggridpathfinding - OpenAIHardSoftware EngineerAggregate Recent Message Events And Active Chats
Design an in-memory aggregation system that tracks rolling window message counts and distinct active entities across chats with bounded memory and O(1) amortized operations.
Coding & AlgorithmsOnsiteSliding WindowData StreamsDesign - OpenAIMediumSoftware EngineerAt-Least-Once Job Queue with Timeouts, Retries, a Dead-Letter Queue and Dependencies
Implement an in-memory job queue with enqueue, reserve, pass, fail and a dead-letter queue, where reservations that outlive their timeout are redelivered for at-least-once delivery, then extend enqueue with job dependencies. It tests state-machine design, timeout tracking, retry accounting and dependency handling.
Software Engineering FundamentalsTechnical Screen - OpenAIMediumSoftware EngineerBehavioral: why OpenAI, AI safety views, 0-to-1 work, feedback, defining success
Behavioral questions reported from OpenAI's software engineering loop: why OpenAI, how you think about AGI and AI safety, a 0-to-1 project, negative feedback you received, and how you defined success for a project. A slide-based project deep dive then probes technical depth under repeated challenge, testing ownership, calibrated judgment and composure.
Behavioral & LeadershipOnsite - OpenAIHardSoftware EngineerBuild a Reliable Streaming Chat UI
This question evaluates understanding of real-time front-end architecture and state management in React, focusing on transient streaming state, concurrency control, UI consistency during tokenized updates, and the appropriate use of hooks such as useRef versus useState in the Software Engineering Fundamentals domain.
Software Engineering FundamentalsHR Screen - OpenAIMediumSoftware EngineerBuild a SaaS API-Credit Ledger With Expiring Grants and Late Events
Implement an API-credit ledger that grants, spends, and reports balances, where each grant expires and spending always draws from the soonest-expiring usable grant first, even when operations arrive out of timestamp order.
Software Engineering FundamentalsOnsitedata-structuresheapevent-ordering - OpenAIHardSoftware EngineerCheapest Daily Shirt Colors With No Color Repeated on Consecutive Days
Pick a blue, green or red shirt for each of n days so that the total price is as low as possible while never buying the same color on two consecutive days, and return the chosen color sequence. It tests dynamic programming over a small state space and reconstruction of the optimal choices.
Coding & AlgorithmsTechnical Screen - OpenAIHardSoftware EngineerCheapest Paint-Booth Color Schedule With No Repeat on Consecutive Cars
Choose one of three paint colors for each car on an assembly line to minimize total cost, never repeating a color on consecutive cars, and return the exact color chosen for each car.
Coding & AlgorithmsTechnical Screendynamic-programmingreconstructiongreedy-vs-dp - OpenAIMediumSoftware EngineerClarify a Machine Topology Coding Task
Implement and formalize an API to analyze distributed accelerator interconnect topologies, separating summary metrics from component-level graph structures and validating topologies like rings, cliques, and lines.
Software Engineering FundamentalsTechnical Screengraph-algorithmsbfsapi-design
Okta
OpenAI