The Clicks We Throw Away
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
Our apps emit a constant stream of user interaction events that today land in a server log file and get thrown away. Design a clickstream pipeline that collects every event once and then serves two very different readers: the product team analyzing history and on-call engineers chasing bug reports.
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
- 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