A curated payments table is plain Parquet
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 curated payments table is plain Parquet. Stripe adds new fields monthly; each schema change forces a 12-hour rewrite of every partition because plain Parquet embeds column names in the file footer. Apply the section's schema-evolution framing and replace the plain Parquet table with a lakehouse format whose metadata layer makes column additions, drops, and type widenings a sub-second metadata commit.
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