Counted Once, Remembered Forever

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
mid

Interview Prompt

A retail brokerage executes about 50 million trades a day across 12 million accounts, and the same execution events feed two consumers: the risk desk's intraday account positions and the end-of-day regulatory filing. Design the pipeline that serves both.

How This Interview Works

  1. Read the vague prompt (just like a real interview)
  2. Ask clarifying questions to the AI interviewer
  3. Draw your pipeline on the design canvas: sources, transforms, storage and checks
  4. Answer the interviewer's follow-up questions, then get a hire or no-hire decision