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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 6571–6600 of 9403 results
- 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 - OracleMediumBackend EngineerExplain How You Use AI in Software Engineering
This question assesses the candidate's practical experience with AI-assisted coding tools, their ability to critically evaluate machine-generated output, and their awareness of engineering rigor regarding security and code quality.
Behavioral & LeadershipOnsiteSoftware EngineeringGenerative AICode Review - 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 - OracleMediumData ScientistExplain Medical AI Data and Evaluation
This question tests the ability to design an end-to-end evaluation and data pipeline for a clinical conversational agent, emphasizing safety, bias mitigation, and rigorous validation in a high-stakes environment.
Machine LearningTechnical ScreenLLMRAGHealthcare AI - 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 - OracleMediumBackend EngineerExplain a Difficult Technical Decision
This question assesses a candidate's ability to articulate complex technical trade-offs, stakeholder management, and the ability to reflect on past decision-making processes.
Behavioral & LeadershipOnsiteBehavioralArchitectureDecision Making - 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 - OracleMediumBackend EngineerFind the Best Profit from One Stock Trade
Tests array traversal, greedy state tracking, and achieving optimal O(n) time and O(1) space complexity for trade optimization.
Coding & AlgorithmsOnsiteArrayDynamic ProgrammingGreedy - 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 - OracleMediumBackend EngineerHandle a Tight Deadline You Could Not Meet
This question assesses the candidate's ability to identify project risks early, manage stakeholder expectations through transparent communication, and implement process improvements to prevent recurrence.
Behavioral & LeadershipOnsiteBehavioralLeadershipProject Management - 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 - OracleHardSoftware EngineerImplement Queue Operations Using Two Stacks
Implement queue enqueue, dequeue, and peek operations using exactly two LIFO stacks. The challenge tests transfer invariants, output ordering, amortized O(1) reasoning, large operation sequences, empty input, and compliance with restrictions against queue-like shortcuts.
Coding & AlgorithmsTechnical Screen - OracleEasySoftware EngineerImplement a Key-Value Cache with Fixed TTL, Renewal and a Live-Entry Count
Implement an in-memory key-value cache whose entries expire a fixed time-to-live after their last write, with put, get, renew and a count of live entries, and write your own tests for it. It tests expiry boundary semantics, renewal rules, efficient cleanup of expired entries and test design.
Software Engineering FundamentalsOnsite - OracleEasySoftware EngineerImplement a Paginated Medical-Record Filter Without Guessing an Ambiguous Rule
This problem tests your ability to handle ambiguous business logic through requirement clarification and implement a robust, paginated filtering system for sensitive data.
Software Engineering FundamentalsTechnical ScreenPaginationRequirementsData-Validation - OracleHardSoftware EngineerImplement in-memory data structures and booking API
This problem tests your ability to design a thread-safe, in-memory booking system using efficient data structures to handle temporal queries and capacity management.
Coding & AlgorithmsTechnical ScreenHash MapConcurrencyAPI Design - OracleMediumSoftware EngineerLargest Island After Converting at Most One Water Cell to Land
Given a grid of land and water, convert at most one water cell to land and return the size of the largest island that can result. An onsite follow-up coding problem that tests connected-component sizing, joining neighboring islands without counting one twice, and efficiency on grids up to 500 by 500.
Coding & AlgorithmsOnsite - OracleMediumSoftware EngineerLeadership and ownership: real examples of leading others and owning an outcome
A behavioral interview question that asks for real examples of leading others toward an outcome and of taking ownership of a problem through to the end. It tests specific storytelling, a clear personal contribution, handling disagreement and setbacks, measurable results and honest reflection.
Behavioral & LeadershipOnsite
Oracle