The Clicks We Throw Away
A hard Pipeline Design mock interview question on DataDriven. Practice with AI-powered feedback, real code execution, and a hire/no-hire decision.
- Domain
- Pipeline Design
- Difficulty
- hard
- Seniority
- L4
Interview Prompt
Our apps emit a constant stream of user interaction events that today land in a server log file and get thrown away. We want a clickstream pipeline that collects every event once and then serves two very different readers: the product team running funnel and feature-adoption analysis across months of history, and on-call engineers who need to pull a single device's last few hours of activity within minutes of a bug report. Design the clickstream data processing pipeline.
Summary
Every tap, swipe, and scroll. At scale.
How This Interview Works
- Read the vague prompt (just like a real interview)
- Ask clarifying questions to the AI interviewer
- Write your pipeline design solution with real code execution
- Get instant feedback and a hire/no-hire decision