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System Design 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 61–90 of 1311 results
- AmazonMediumSoftware EngineerDesign a Scalable Metrics Monitoring System
Design a high-throughput time-series metrics monitoring and alerting platform similar to Amazon CloudWatch, focusing on series identity, cardinality controls, and low-latency aggregations.
System DesignOnsitesystem-designtime-seriesmonitoring - AmazonEasySoftware EngineerDesign a Scalable News Feed
This problem evaluates your ability to design a feed generation architecture, specifically comparing push vs. pull models for users with varying follower counts.
System DesignTechnical ScreenCachingScalabilityDatabases - AmazonMediumSoftware EngineerDesign a Scalable and Polite Web Crawler
This question tests the ability to design a distributed, fault-tolerant system that balances high-throughput data collection with ethical crawling constraints and resource efficiency.
System DesignOnsiteDistributed SystemsQueueingData Pipelines - AmazonHardSoftware EngineerDesign a URL shortening platform
This question evaluates competency in system design and distributed systems architecture, including API design, scalable short-code generation, data modeling and storage/sharding, caching and CDN strategies, consistency and fault-tolerance trade-offs, rate limiting and abuse prevention, analytics, compliance, and capacity planning.
System DesignOnsite - AmazonHardSoftware EngineerDesign a cloud database write path and recovery
This question tests the ability to architect a distributed database write path that decouples compute from storage, specifically focusing on how to maintain ACID properties during failures.
System DesignTechnical ScreenDistributed SystemsDatabasesDurability - AmazonHardSoftware EngineerDesign a configuration subscription service
This question evaluates skills in designing a distributed configuration and subscription service, covering API design, real-time notification semantics (delivery and ordering guarantees), versioning, concurrency and thread-safety, durability and recovery, multi-tenant isolation, security, and scalability concerns.
System DesignOnsite - AmazonHardSoftware EngineerDesign a distributed job scheduler service
This question tests the ability to design a distributed, fault-tolerant system capable of scheduling and executing tasks at a massive scale with strict latency requirements.
System DesignOnsiteDistributed SystemsScalabilityScheduling - AmazonHardSoftware EngineerDesign a file search module like UNIX find
This question evaluates object-oriented and API design skills, filesystem semantics (pattern matching, file types, timestamps, permissions, symlink handling), traversal and concurrency strategies, and robustness for large or error-prone directory trees.
System DesignOnsite - AmazonHardSoftware EngineerDesign a keyboard and mouse input system
An Amazon software-engineer system-design screen: design a system that captures keyboard and mouse events and reconstructs exactly what the user typed. It tests low-latency event capture, total ordering across multiple devices, IME/composition and grapheme-safe text reconstruction, mouse selection and clipboard/undo-redo, plus durable persistence with deterministic crash-safe replay.
System DesignTechnical Screen - AmazonMediumSoftware EngineerDesign a large-scale temperature sensor system
This question tests your ability to design a high-throughput data ingestion pipeline and storage architecture for a fleet of IoT sensors, focusing on write-heavy scalability and time-series query performance.
System DesignTechnical ScreenTime-SeriesScalabilityDistributed Systems - AmazonHardSoftware EngineerDesign a log filtering and analytics service
An Amazon software engineer system design question: design a log filtering and analytics service that ingests high-volume application logs and supports attribute/substring filtering, error counts over a time window, and hourly histograms by pattern or ID. It tests ingestion API design, dual search + OLAP storage with hourly rollups, schema and indexing, late/duplicate-event handling, partitioning and retention, and correctness-vs-latency trade-offs with complexity analysis.
System DesignTechnical Screen - AmazonHardSoftware EngineerDesign a memory usage switcher with thresholds
This question evaluates system design and operational engineering skills in process memory management, runtime configurability, observability, and reliability, and belongs to the System Design domain; it primarily tests practical application with system-level conceptual reasoning.
System DesignTechnical Screen - AmazonMediumSoftware EngineerDesign a multi-size storage locker system
This question tests your ability to design a scalable, distributed reservation system that handles resource allocation (bin packing) under concurrency constraints.
System DesignOnsiteConcurrencyAPI DesignDistributed Systems - AmazonMediumSoftware EngineerDesign a package installer with dependencies
This question tests your ability to design a system that manages complex dependency graphs, ensuring package integrity, version compatibility, and atomic installation operations.
System DesignTechnical ScreenGraphsDependency ResolutionTransactions - AmazonMediumSoftware EngineerDesign a scalable image-based social network
This question tests your ability to design a distributed system architecture capable of handling high-volume image uploads, metadata storage, and low-latency feed retrieval.
System DesignOnsiteScalabilityDistributed SystemsCaching - AmazonHardSoftware EngineerDesign a scalable parking lot system
Design a scalable parking lot system evaluates requirements, scale assumptions, API/data design, architecture, trade-offs, failure modes, and rollout in a realistic interview setting. A strong answer states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.
System DesignTechnical Screen - AmazonMediumSoftware EngineerDesign an AI Fraud-Triage Agent Over a 1 TB/Day Payments Event Stream
Design a service where an AI agent investigates flagged payment events inside a stream running at roughly 1 TB of events per day, covering capacity math, where the agent sits relative to deterministic detection, and the cost and adversarial-input guardrails that keep it from becoming a liability.
System DesignTechnical Screensystem-designstreamingfraud - AmazonEasySoftware EngineerDesign an Amazon Locker Service
Tests object-oriented design and state-machine modeling for a self-service package locker station, focusing on parcel allocation, code expiration, and physical-vs-logical state consistency.
System DesignTechnical ScreenObject-Oriented DesignState MachineIoT - AmazonMediumApplied ScientistDesign an S3-like object storage service
This question evaluates understanding of distributed systems, object storage architecture, REST API design, multipart upload semantics, replication and durability strategies, failure recovery, and scalability concerns.
System DesignOnsite - AmazonHardSoftware EngineerDesign an extensible ticketing system
This question evaluates software architecture and system-design competencies, covering extensibility patterns, concurrency control for high-throughput ticketing, transactional and idempotency guarantees, persistence/schema modeling, API design, and pluggable pricing strategies.
System DesignTechnical Screen - AmazonHardSoftware EngineerDesign an intersection traffic-light system
This question evaluates system design competency across real-time control and safety-critical logic, API and data modeling, sensor/actuator integration, and operational scalability for traffic-signal controllers.
System DesignTechnical Screen - AmazonHardSoftware EngineerDesign an online bookstore for browse and purchase
Design an online bookstore for browse and purchase evaluates requirements, scale assumptions, API/data design, architecture, trade-offs, failure modes, and rollout in a realistic interview setting. A strong answer states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.
System DesignOnsite - AmazonHardSoftware EngineerDesign delayed job scheduler (LLD)
This question evaluates system design and distributed-systems competencies, including scheduling algorithms, durable persistence and recovery, concurrency control, delivery semantics, and operational concerns, and it belongs to the System Design category.
System DesignOnsite - AmazonHardSoftware EngineerDesign document-tag classes with concurrency safety
Design document-tag classes with concurrency safety evaluates requirements, scale assumptions, API/data design, architecture, trade-offs, failure modes, and rollout in a realistic interview setting. A strong answer states assumptions, handles edge cases, explains trade-offs, and shows how to validate the result clearly.
System DesignOnsite - AmazonMediumSoftware EngineerDesign globally consistent metadata service
This question tests the ability to design a globally distributed metadata service that requires strict consistency for frequent read/write operations across multiple geographic regions.
System DesignOnsiteDistributed SystemsConsistencyScalability - AmazonHardSoftware EngineerDesign in-memory threshold switcher
This question evaluates a candidate's ability to design memory-aware control systems, covering skills such as hysteresis-based thresholding, dynamic runtime reconfiguration, thread-safe concurrency, low-overhead metric sampling, event-driven state notifications, and handling multi-process and failure edge cases.
System DesignTechnical Screen - AmazonHardSoftware EngineerDesign locker allocation service
This question evaluates a candidate's understanding of stateful system design, resource allocation strategies, concurrency control, API and data modeling, and fault tolerance in the context of real-time locker assignment.
System DesignTechnical Screen - AmazonMediumSoftware EngineerDesign multi-tenant ingestion and processing platform
This question tests the ability to design a multi-tenant data platform that ensures resource fairness, performance isolation, and cost attribution at scale.
System DesignOnsiteMulti-tenancyScalabilityDistributed Systems - AmazonMediumSoftware EngineerDesign pickup point planning for ride-hailing
Design a ride-hailing pickup-point planning system. Covers map snapping, candidate generation, driver and passenger routing, safety filtering, scoring objectives, app presentation, architecture, historical learning, and A/B metrics.
System DesignTechnical Screen - AmazonHardSoftware EngineerDesign real-time top-K products service
An Amazon software-engineer system-design screen: design a real-time service that ingests a stream of purchase events (customer_id, item_id, timestamp) and continuously serves the top-K most purchased items over multiple rolling windows (e.g. last 5 minutes, last 1 hour, 24 hours, and daily totals). The answer covers ingestion and partitioning, event-time windowing with watermarks, exact min-heap vs. approximate Count-Min-Sketch / Space-Saving top-K, late/duplicate/out-of-order handling, state and TTL, exactly-once fault tolerance, horizontal scaling, serving APIs, and latency-vs-accuracy trade-offs.
System DesignTechnical Screen
Amazon