System design questions
Turn a broad system prompt into explicit engineering decisions
System design practice should reveal how requirements drive architecture. Avoid jumping straight to components: establish users, scale, operations, and failure expectations first.
Practice technical explanationsA durable design sequence
Clarify functional and quality requirements, estimate the workload, define interfaces and data, draw a simple end-to-end path, then deepen the bottlenecks that matter.
- Design an interview scheduling service with reminders.
- Design a document upload and text-processing pipeline.
- Design a job-search service with filters and saved results.
- Design a real-time session service that tolerates reconnects.
Questions to ask your own design
Where is state authoritative? What fails independently? How are retries made safe? Which metric detects harm before users report it? What tradeoff would change at a different scale?
Put the guidance into practice
Use PrepRoom as a structured practice partner, then apply your own judgment to every result.
Practice technical explanations