Five Times the Traffic, Five Times the Bill
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 fixed-size Spark cluster sits idle 80% of the time yet still falls behind whenever a product launch pushes event traffic to 5x its quietest hour. Design the pipeline that replaces it for both the operations on-call team and the analytics dashboards.
Summary
Scale up when needed. Do not bankrupt the team.
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