How do I approach System Design interview questions?

System Design questions require understanding of core concepts and practice. PracHub provides solutions with explanations to help you master system design interviews.

What difficulty level is this interview question?

This is a medium difficulty System Design question, commonly asked during Onsite rounds at Uber.

What role is this question designed for?

This question is commonly asked for Software Engineer candidates at Uber during technical interviews.

Design a Daily Puzzle Platform | Uber Interview Question

Design a Daily Puzzle Platform

Last updated: May 2, 2026

Quick Overview

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.

Uber

Apr 19, 2026, 12:00 AM

Software Engineer

Onsite

System Design

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.

Solution

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