The Consent Stitcher

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

Seniority

staff

Interview Prompt

Our platform gets 100 million visitors a month and we monetize through health advertising and a premium membership. The problem is that most visitors start as anonymous users, then some create accounts during the session. Right now our analytics treats the pre-login and post-login parts of the same visit as two separate users, so we undercount engagement and overcount unique visitors. Design a pipeline that stitches sessions and handles the consent propagation required when users change their privacy settings.

How This Interview Works

1. Read the vague prompt (just like a real interview)
2. Ask clarifying questions to the AI interviewer
3. Write your pipeline design solution with real code execution
4. Get instant feedback and a hire/no-hire decision