Two streaming aggregators sit at opposite ends of the idempotency-cost spectrum, and their architect
A medium 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
- medium
Interview Prompt
Two streaming aggregators sit at opposite ends of the idempotency-cost spectrum, and their architectures have been swapped. A financial-close pipeline whose output feeds an SEC report writes to a Redis counter; a real-time page-view counter for a five-second engagement dashboard runs Flink 2PC into Iceberg. Apply the section's three-question decision framework and put each aggregator on the architecture its use case actually justifies.
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