Design a Daily Puzzle Platform
Company: Uber
Role: Software Engineer
Category: System Design
Difficulty: medium
Interview Round: Onsite
Design a backend system for a daily puzzle platform.
Users should be able to:
- Sign in and view the puzzle of the day.
- Submit an answer for the current puzzle.
- Receive a score or correctness result for the submission.
- View their own score, submission history, and recent puzzle results.
Clarify requirements, propose APIs, design the data model, describe the main services, and discuss scaling, consistency, scoring, abuse prevention, and observability.
Quick Answer: This question evaluates backend system-design skills including API design, data modeling, service decomposition, scaling and consistency trade-offs, scoring logic, abuse prevention, and observability.