The Fare Aggregator
A medium 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
- medium
- Seniority
- L5
Interview Prompt
Design the pipeline behind flight search and booking for 100 million users, fed by 80 billion fare checks a day from dozens of airline APIs and global distribution systems. The pricing team sees fares go stale within seconds in booking surges, and no two sources agree on fields: departure_time here, dep_utc there, a Unix timestamp elsewhere.
Summary
Airfares shift every minute. Catch the best ones.
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