600 Million Events a Day
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
A Kafka stream carries 600 million e-commerce interaction events a day, retained for two years and read by four consumers on very different clocks: personalization, fraud, analytics dashboards and model training. Design the storage and serving architecture that carries those events from the stream to every reader.
Summary
600 million events a day. Two years of retention.
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