practice a little every day, paws crossed ♡
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.
- 9403
- Questions
- 546
- Companies
- 11
- Topics
- 8
- Languages
Showing 4171–4200 of 5874 results
- OracleMediumSoftware EngineerDesign a Five-Minute Top-K Error Log Service
Design a fault-tolerant, high-throughput log aggregation service that identifies and ranks the top-K microservices with the highest error counts over a sliding five-minute window.
System DesignOnsiteStream ProcessingTop-KDistributed Systems - OracleMediumSoftware EngineerDesign a Sliding-Hour Top-100 User Event Pipeline
Design a real-time event-time aggregation pipeline to compute the top 100 most active users over a trailing 60-minute sliding window at scale.
System DesignOnsiteStream ProcessingTop-KSliding Window - OracleMediumSoftware EngineerDesign a Software Load Balancer
This problem tests the ability to architect a scalable, fault-tolerant entry point for distributed systems, focusing on request routing, health monitoring, and concurrency management.
System DesignOnsiteLoad BalancingNetworkingDistributed Systems - OracleMediumSoftware EngineerDesign a Synchronously Replicated Hash Map
Design an in-memory key-value storage system utilizing active-passive synchronous replication where writes must commit on both nodes or fail atomically.
System DesignOnsitedistributed-systemssystem-designreplication - OracleMediumSoftware EngineerDesign a URL shortener: short-code generation, fast redirects and scaling
A system design question that asks for a URL shortening service that turns long links into short codes and redirects visitors quickly. It tests requirements and capacity estimates, collision-free short-code generation, redirect caching and status codes, data modeling and partitioning, expiry, analytics and abuse handling.
System DesignOnsite - OracleMediumSoftware EngineerDesign a Video Upload Service for 100 GB Files with Chunked, Resumable Uploads
A system design question about building a service that accepts video uploads of up to 100 GB. It covers moving very large files efficiently, splitting them into chunks, resuming interrupted uploads, choosing storage for bytes and metadata, and scaling to many concurrent uploads.
System DesignTechnical Screen - OracleMediumSoftware EngineerDesign a like-count system for a large video platform with viral-video bursts
A system design question for the like feature of a large video platform. It probes one-like-per-user correctness, serving counts and viewer state at huge read volume, absorbing bursts of likes on viral videos, exact versus approximate counting trade-offs, counter reconciliation, and abuse protection.
System DesignOnsite - OracleMediumSoftware EngineerDesign a photo-sharing social network with follows, media uploads and a home feed
A system design question for a photo and video sharing social network with follows, media uploads and a home feed. It probes estimation, media storage and delivery, feed generation for ordinary and very popular accounts, data modeling, caching, and defending trade-offs under heavy cross-questioning.
System DesignOnsite - OracleMediumSoftware EngineerDesign a rate limiter
This question evaluates a candidate's ability to design scalable, correct distributed rate limiting mechanisms, testing competencies in distributed systems, concurrency control, API gateway behavior, observability, and configurability within the System Design domain.
System DesignOnsite - OracleMediumSoftware EngineerDesign an E-Commerce Recommendation System from Browsing History
This problem tests the ability to architect a scalable, low-latency recommendation engine that translates real-time user activity into personalized product suggestions.
ML System DesignOnsiteSystem DesignRecommendation SystemsScalability - OracleMediumSoftware EngineerDesign an Enterprise Remote Browser Isolation System
This problem tests the ability to architect a low-latency, secure isolation platform that bridges the gap between untrusted web content and enterprise endpoints.
System DesignOnsiteSecurityLow LatencyDistributed Systems - OracleMediumSoftware EngineerDesign an Internal Metrics Ingestion Service
Design a scalable internal metrics collection and storage platform capable of ingesting high-throughput time-series data from hundreds of thousands of hosts, decoupling ingestion from query workloads.
System DesignOnsiteTime SeriesDistributed SystemsTelemetry - OracleHardSoftware EngineerDesign scalable, highly available GenAI serving
This question evaluates understanding of scalable, highly available generative AI inference platforms and associated competencies in distributed systems, ML model serving, autoscaling and GPU scheduling, global request routing, model/version management, stateful dependency handling, observability, and rate limiting.
ML System DesignOnsite - OracleEasySoftware EngineerDesign structure for first unique login user
This question evaluates a candidate's ability to design an efficient online data structure that maintains a stream of login events and supports constant-time updates and queries for the earliest user with exactly one login.
Coding & AlgorithmsTechnical Screen - OracleMediumSoftware EngineerDetect whether a directed graph given as an edge list contains a cycle
A coding question that asks whether a directed graph, given as a node count and a list of edges, contains at least one directed cycle. It tests graph traversal on large inputs and careful handling of self-loops, duplicate edges, converging paths and disconnected components.
Coding & AlgorithmsOnsite - OracleMediumSoftware EngineerEnumerate Right-and-Down Paths Through a Binary Matrix
This problem tests your ability to explore paths in a grid using depth-first search (DFS) with backtracking while maintaining lexicographical output constraints.
Coding & AlgorithmsOnsiteDFSBacktrackingRecursion - OracleHardSoftware EngineerEvaluate Subjective and Nondeterministic Agent Outputs
Create an evaluation program for subjective, nondeterministic AI-agent outputs when direct user feedback is sparse. Cover stratified tasks, versioned rubrics, repeated sampling, calibrated human review, judge agreement and bias, uncertainty-aware comparisons, severe-failure gates, online signals, and rollback criteria.
ML System DesignTechnical Screen - OracleMediumSoftware EngineerExplain Java String Storage and Construction Choices
Tests deep understanding of Java string memory representation, the string constant pool, immutability, and construction performance trade-offs.
Software Engineering FundamentalsOnsiteJavaJVMMemory Management - OracleMediumSoftware EngineerExplain What Motivates You at Work
This question assesses your self-awareness, professional values, and how your personal work style aligns with the challenges of a fast-paced software engineering environment.
Behavioral & LeadershipTechnical ScreenBehavioralSelf-AwarenessSoft Skills - OracleMediumSoftware EngineerExplain a Team-Owned System Architecture
This question tests your ability to articulate the high-level architecture of a complex system you have worked on, focusing on data consistency, system scalability, and the rationale behind specific design choices.
Software Engineering FundamentalsOnsiteSystem DesignArchitectureReliability - OracleHardSoftware EngineerExplain your project system design
This interview question evaluates requirements, scale assumptions, API/data design, architecture, trade-offs, failure modes, and rollout in a realistic interview setting. A strong answer for Explain your project system design states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.
System DesignOnsite - OracleMediumSoftware EngineerExtend and optimize an existing CLI tool
This problem tests your ability to refactor legacy CLI code, implement modular features, and optimize performance for large-scale data processing.
Software Engineering FundamentalsOnsiteRefactoringCLIPerformance - OracleMediumSoftware EngineerFewest Coins for an Amount with Unlimited or Single-Use Coins
Return the fewest coins that add up exactly to an amount, first when every coin value can be reused without limit and then when each listed coin can be used at most once. An onsite coding problem that tests the difference between unlimited and single-use selection and the handling of amounts that cannot be formed.
Coding & AlgorithmsOnsite - OracleMediumSoftware EngineerFind Each Island's Maximum Height
This problem tests your ability to perform graph traversal (BFS/DFS) on a 2D grid while maintaining state across connected components.
Coding & AlgorithmsOnsiteGraphBFSDFS - OracleMediumSoftware EngineerFind Global and Rolling Top-K URLs Under a Memory Limit
Design a memory-bounded distributed analytics system to compute both global (all-time) and rolling 24-hour top-K accessed URLs from a high-throughput event stream.
System DesignOnsiteStream ProcessingTop-KDistributed Systems - OracleMediumSoftware EngineerFind shortest subarray meeting target sum
Find shortest subarray meeting target sum evaluates algorithm design, data structures, correctness, complexity, edge cases, and implementation details in a realistic interview setting. A strong answer states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.
Coding & AlgorithmsOnsite - OracleMediumSoftware EngineerFind the Lexicographically Maximum Suffix
This problem tests string manipulation, greedy algorithm design, and efficiency. It requires an O(n) solution to avoid Time Limit Exceeded errors on long strings, as naive O(n^2) comparisons will fail.
Coding & AlgorithmsOnsiteStringsTwo PointersGreedy - OracleMediumSoftware EngineerFind users with at least one valid session
This question evaluates the ability to parse and process event logs, pair signin/signout events per user, and handle unordered timestamps and per-user state with time-window constraints.
Coding & AlgorithmsOnsite - OracleMediumSoftware EngineerHandle On-Call Incidents
Review an evidence-led on-call approach covering severity, reversible mitigation, communication, verified recovery, and durable corrective actions.
Behavioral & LeadershipOnsite - OracleHardSoftware EngineerHow do you prioritize and handle failures?
This question evaluates prioritization, incident-response and failure-management competencies including stakeholder communication, customer-impact mitigation, and learning-from-failure within the Behavioral & Leadership category for software engineers, emphasizing practical, experience-based application rather than abstract theory.
Behavioral & LeadershipTechnical Screen
Oracle