The Signals That Power Recommendations
A medium 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
- medium
- Seniority
- L5
Interview Prompt
A recommendation platform serving millions of users learns from clicks, purchases, saves, and ratings emitted by several product surfaces, and different teams consume those signals with different latency needs. Design the ingestion and feature pipeline that keeps user profiles current.
Summary
Fresh signals, many teams, one pipeline.
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