Google
Google Interview Preparation
Preparing for an interview at Google requires a solid understanding of core computer science fundamentals, along with specialized knowledge relevant to their specific domain and engineering culture.
System Design Focus
For system design rounds at Google, you should be prepared to discuss architectures that can handle their specific scale and product requirements. Practice explaining why each component belongs in your design and the trade-offs involved.
Here are previously asked system design questions to help you practice specifically for Google:
- Design a scalable rate limiter for Google Cloud APIs that operates across global regions.
- Design a URL shortener like
goo.gl.
- Design Google Maps' routing and estimated time of arrival (ETA) service.
- Design a distributed cache system similar to Memcached.
- Design a scalable key-value store similar to Google Bigtable.
- Design Google Docs with real-time collaborative editing and conflict resolution.
- Design the infrastructure for YouTube, handling video upload, distributed transcoding, and CDN streaming.
- Design a web crawler that Google might use to index the internet at scale.
- Design Google Photos, focusing on global photo syncing, storage, and album sharing.
- Design a distributed message queue system like Google Cloud Pub/Sub.
- Design a highly scalable autocomplete and typeahead suggestion system for Google Search.
- Design Google Calendar, handling recurring events, timezone synchronization, and notifications.
- Design a notification system capable of sending billions of push, SMS, and email alerts daily.
- Design a proximity service (like finding nearby restaurants or businesses on Google Maps).
- Design a distributed file system like Google File System (GFS) or Colossus.
General Preparation Advice
- Coding & Algorithms: Ensure your foundation in data structures (Arrays, Strings, Hash Maps, Trees, Graphs) is solid. Practice writing solutions out loud so your reasoning is visible while you code.
- Behavioral: Prepare short STAR stories that show ownership, collaboration, debugging, conflict resolution, learning, and measurable impact. Keep the examples specific and tied to real decisions you made.