Interview questions
Find a company or topic. Read the sources, then practice.
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Find a company or topic. Read the sources, then practice.
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Showing 1–15
Companies: DoorDash, Microsoft, OpenAI
API Design · Caching · System Design · System Design Fundamentals
Last reported Oct 2026
Read-heavy key-value service: unique short-code generation, hot-key caching, redirect semantics.
Companies: Amazon, Anduril, Apple, Bending Spoons +26
API Design · caching · hot-keys · http-redirects
Last reported Oct 2026
Caching · Search & Feed Systems · System Design
Last reported Jun 2026
Companies: OpenAI
Caching · CI/CD & Deployment · System Design
Last reported May 2026
Companies: Anthropic
Caching · Data Structure Design · Database Internals · System Design
Last reported Mar 2026
Companies: Anthropic
Caching · LLM Inference & Serving · ML System Design
Last reported Sep 2025
Map tiles across zoom levels: sparse demand, regional edits, cache deadlines, and render capacity.
General practice
backpressure · cache-invalidation · caching · geospatial-indexing
Fan-out on write vs read, celebrity hybrid, feed caches, outbox, ranking as an extension.
General practice
caching · denormalization · fan-out · hot-keys
Location-based discovery with ranked search, reliable review updates, and ratings that stay correct across edits and deletions.
General practice
caching · data-consistency · geospatial-search · pagination
Location-based weather reads over changing external data: geographic reuse, late observations, forecast versions, and honest freshness during outages.
Companies: Amazon, Chime, HubSpot, Klaviyo +2
caching · data-ingestion · data-versioning · event-time
Fresh location streaming and road-aware arrival predictions: noisy GPS, changing traffic, reconnects, and trip-scoped access.
Companies: Uber
authorization · caching · map-matching · real-time-messaging
Diagnose an existing inference service, control overload, keep features fresh through zone failures, and migrate models and feature schemas safely.
Companies: Reddit
ml-serving · capacity-planning · backpressure · caching
A visual bookmark service must deliver images efficiently, preserve board access rules, and find related pins across billions of images.
General practice
access-control · caching · image-processing · object-storage
A discussion platform with changing vote totals, community post ranks, popular communities, and large comment trees.
General practice
caching · concurrency · data-modeling · event-processing
Post access across cached and replicated content: blocks, audience changes, strict revocation, and popular posts.
General practice
authorization · caching · consistency · failure-handling