Live Viewers, Live Billing
A hard Pipeline Design mock interview question on DataDriven, with an AI interviewer who asks follow-up questions and a hire or no-hire decision at the end.
- Domain
- Pipeline Design
- Difficulty
- hard
- Seniority
- L4
Interview Prompt
Advertisers keep disputing our impression invoices, and creators complain their live viewer count trails the chat. A top stream draws 200k concurrent viewers, and an ad break fires every viewer's impression within the same second. Design the pipeline for our livestream events.
Summary
The stream is live. The data cannot wait.
How This Interview Works
- Read the vague prompt (just like a real interview)
- Ask clarifying questions to the AI interviewer
- Draw your pipeline on the design canvas: sources, transforms, storage and checks
- Answer the interviewer's follow-up questions, then get a hire or no-hire decision