Trees Within Trees
A hard Data Modeling mock interview question on DataDriven. Practice with AI-powered feedback, real code execution, and a hire/no-hire decision.
- Domain
- Data Modeling
- Difficulty
- hard
- Seniority
- L6
Interview Prompt
We run a cloud file storage platform where people upload files from their phones and laptops, nest them into folders, and share them with other users. Photos carry camera and location metadata held under stricter retention rules than ordinary files, and each user's storage is capped by a quota we track as it moves day to day. Design the data model.
Summary
A file is also a folder. A folder is also a file.
How This Interview Works
- Read the vague prompt (just like a real interview)
- Ask clarifying questions to the AI interviewer
- Write your data modeling solution with real code execution
- Get instant feedback and a hire/no-hire decision