Two Years of Clicks, Cheap
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
- L7
Interview Prompt
Our platform generates 600 million user interaction events per day through Kafka and we need a cost-efficient architecture to store and query this data for analytics with a two-year retention requirement. Query latency and storage cost are both first-class constraints. Design the end-to-end ingestion, storage, and query architecture.
Summary
Two years of clicks. Every query has to be affordable.
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