Two Ways to Catch a Change
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
Should we capture changes from our several production databases by reading each database's write-ahead log, or with triggers? Design the change data capture pipeline that replicates them into the warehouse, and make a concrete recommendation on the capture method for each source.
Summary
Two ways to watch the database. Each has a cost.
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