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Caching System Design Questions

10 design prompts lean on caching. Each one runs on a whiteboard canvas with AI feedback graded against a hidden rubric.

New to caching? There's a free 5-lesson interactive course (~51 min) with animated architectures and runnable simulations. Learn the concept first →

Design problems

URL Shortener

Design a URL shortener like TinyURL or Bitly.

Database ScalingLoad Balancing & Scaling

Rate Limiter

Design a distributed rate limiter for a company's public APIs.

Consistency & Trade-offsLoad Balancing & Scaling

Pastebin

Design a Pastebin-style text snippet sharing service.

Database ScalingLoad Balancing & Scaling

News Feed

Design a social news feed like Instagram's or Facebook's home feed.

Database ScalingQueues & Async Processing

Video Streaming

Design the video playback and delivery system for a streaming service like Netflix or YouTube.

Database ScalingLoad Balancing & Scaling

Distributed Cache

Design a distributed in-memory cache like Redis or Memcached.

Consistency & Trade-offsLoad Balancing & Scaling

Maps & ETA

Design a maps routing and ETA service like Google Maps.

Database ScalingLoad Balancing & Scaling

Search Autocomplete

Design a search autocomplete (typeahead) service.

Database ScalingLoad Balancing & Scaling

Web Crawler

Design a large-scale distributed web crawler.

Database ScalingQueues & Async Processing

Recommendation System

Design a personalized recommendation system like Netflix's.

Database ScalingQueues & Async Processing

Want the pressure version? Any of these can run as a live 45-minute design interview with follow-up questions and a verdict. Set up a design interview