600 Million Events a Day
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
- L7
Interview Prompt
Our e-commerce platform generates 600 million user interaction events per day through Kafka, and we need to store and serve this data for both real-time personalization and offline analytics teams. Current ad-hoc queries are scanning the entire dataset on every run. Design a storage and query architecture that supports both use cases cost-efficiently with two-year data retention.
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
- Write your pipeline design solution with real code execution
- Get instant feedback and a hire/no-hire decision