A platform team has two transforms wired backwards
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
A platform team has two transforms wired backwards. A daily 12-table revenue join runs on a $4K/month Spark cluster pulling data out of Snowflake and writing it back; a PyTorch image-feature extraction runs as a dbt SQL UDF that silently writes nulls. Apply the section's ETL-vs-ELT rule and swap the two transforms so each runs on the right tool.
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