Not Every Team Can See Every Row
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 security reviewer found that an engineer had copied confidential HR files straight out of our S3 bucket, a read the query layer never saw. Design the warehouse we build on that S3 data, about 2 TB a day read by 300 analysts, so confidential data reaches only the groups allowed to see it.
Summary
Everyone can see the bucket. Not everyone should.
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